Application

Application for a Building Code Modification Request can be found here. 

At no cost, the owner or owner’s authorized agent (In the case of a project requiring the services of a State of Tennessee Architect or Engineer, the application must be completed by the licensed architect or engineer and be signed and sealed in accordance with TN State Board of Architectural and Engineer Examiners--Rules of Professional Conduct(PDF, 219KB) ) shall complete the application filling out all fields and descriptions.

In addition to completing the application, the applicant shall also submit all supporting documentation, drawings, diagrams, interpretations, examples, calculations, test reports, etc., so as to justify the request. Seismic requests must include the ASCE 7 Hazard tool (found here).   Vague or incomplete applications will be returned

Submission

Completed BCMR Applications shall be submitted via email to bldginspections@knoxvilletn.gov. City staff will review your request as soon as possible, informing you of the results via email.

Introduction

The International family of codes, a.k.a. “I-Codes” allow for deviations from the strictest letter of the code where there are practical challenges that can not be met. Where this is decided to be the case, the Code allows for alternative solutions. The 2018 International Building Code section 104.10-MODIFICATIONS states the following:

“Where there are practical difficulties involved in carrying out the provisions of this code, the building official shall have the authority to grant modifications for individual cases, upon application of the owner or the owner’s authorized agent, provided that the building official shall first find that special individual reason makes the strict letter of this code impractical, the modification is in compliance with the intent and purpose of this code and that such modification does not lessen health, accessibility, life and fire safety or structural requirements. The details of action granting modifications shall be recorded and entered in the files of the department of building safety.”

Process

In the cause of fairness, consistency, transparency and record keeping, such modifications to the building codes must be properly applied for, documented, substantiated, reviewed and either accepted or rejected by the building official. Upon receipt of a (BCMR) Building Code Modification Request, City staff will gather to discuss the merits of the request, whether the request meets the intent and purpose of the Code, and determine whether the health, accessibility, life and fire safety or structural requirements have not been reduced or harmed. The Building Official with either: APPROVE, REJECT or ask that the applicant REVISE the request. Upon receipt of a REJECTED modification request, the applicant, at his/her discretion and expense has the right to challenge the determination through the appeals process to the Construction Appeals Board as granted by IBC Section 113-BOARD OF APPEALS.

Application

Application for a Building Code Modification Request can be found here.  At no cost, the owner or owner’s authorized agent (In the case of a project requiring the services of a State of Tennessee Architect or Engineer, the application must be completed by the licensed architect or engineer and be signed and sealed in accordance with TN State Board of Architectural and Engineer Examiners--Rules of Professional Conduct(PDF, 219KB) ) shall complete the application filling out all fields and descriptions. In addition to completing the application, the applicant shall also submit all supporting documentation, drawings, diagrams, interpretations, examples, calculations, test reports, etc., so as to justify the request. Vague or incomplete applications will be returned.

Submission

Completed BCMR Applications shall be submitted via email to bldginspections@knoxvilletn.gov. City staff will review your request as soon as possible, informing you of the results via email.

Accessibility Upgrades for Existing Buildings

Existing Non-compliant Buildings

Buildings that are not entirely accessible to persons with disabilities are required to undergo accessibility upgrades when a building permit is issued for alterations/renovations.

Why?

Not all existing buildings and structures are 100% accessible, many buildings were built before the 1990 Americans with Disabilities Act. In fact, some buildings built after the ADA were not built property and need to be altered in accordance with these guidelines. No “GRANDFATHER” or “IF YOU DON'T TOUCH IT…YOU CAN LEAVE IT” types of exemptions exist. Changing the occupancy of a building has no impact on the existing facility unless alterations are made in conjunction with the occupancy change. A non-accessible building will gradually be brought into compliance over time after successive alterations/renovations.

When?

The 2018 International Existing Building Code requires buildings or structures undergoing alterations to provide accessibility in accordance with Section 305-ACCESSIBILITY FOR EXISTING BUILDINGS. Buildings undergoing alterations, in accordance with Section 305.7 are REQUIRED to allocate 20% of their project valuation to accessibility improvements where the existing building is not 100% accessible to persons with disabilities. This requirement is identical to Federal ADA Law for existing buildings and structures. The accessibility upgrades are applicable only to areas of primary function, toilet facilities and drinking fountains serving the area and to the routes to get to such areas.

The accessible alterations required to meet this provision may be outside the original scope of work, maybe outside the lease space of the tenant and maybe completely outside the building and be site related. i.e. parking, routes, entrances.

How Much is Required to be Spent?

The customer is required to state the project valuation as part of the permit application as given in IEBC Section 108.3-VALUATION. The following alterations are exempt from triggering an accessibility improvement and are not calculated into the 20% budget: 1. Alterations limited solely to windows, hardware, operating controls, electrical outlets and signs, 2. alterations limited solely to mechanical systems, electrical systems, installation or alteration of fire protection systems, 3. abatement of hazardous materials, 4. alterations to improve the accessibility of a facility and 5. alterations solely to areas of Type B Dwelling and Sleeping Units.

Sample Calculation:

Gross project value: $250,000.00

Windows, hardware, electrical, signs: -$45,000.00

Mechanical systems, electrical systems: -$60,000.00

Asbestos removal: -$20,000.00

Accessible exterior ramp: -$10,000.00

Replace finishes, type B apartments: -$24,000.00

Net value: $220,000.00

20% accessibility upgrades=0.2*$220,000 = $44,000.00

Therefore, a minimum of $44,000.00 shall be allocated to accessibility improvements, even if it does not result in a 100% accessible building or structure. $44,000.00 MUST be spent on accessibility improvements. During the plan review process, City staff will determine proper compliance with these regulations.

Preamble (City of Knoxville, Code of Ordinances-Section 18-1)

The council of the city finds that excessive noise is detrimental to the physical, mental and social well-being of the citizens of the city as well as to their comfort, living conditions, general welfare and safety and hereby declares it necessary to provide for more effective regulation of excessive noise. It is the intent of these regulations to establish standards that will eliminate or reduce unnecessary and excessive noise, which is physically harmful and otherwise detrimental to individuals and the community in the enjoyment of life, property and conduct of business.

Between the hours of 7:00 AM and 12:00 Midnight

• Residential Construction--No person shall cause, suffer, allow or permit sound from any source which, when measured from the real property boundary of the source of the sound, is in excess of a C-weighted sound pressure level of 65 dB(C), or impulsive sound which has a C-weighted sound pressure level of 80 dB(C).

• Commercial Construction--No person shall cause, suffer, allow or permit sound from any source which, when measured from the real property boundary of the source of the sound, is in excess of a C-weighted sound pressure level of 80 dB(C), or impulsive sound which has a C-weighted sound pressure level of 80 dB(C).

Between the hours of 12:00 Midnight and 7:00 AM

• Residential Construction--no person shall cause, suffer, allow or permit sound from any source which, when measured from the real property boundary of the source of the sound, is in excess of a C-weighted sound pressure level of 60 dB(C), or impulsive sound which has a C-weighted sound pressure level of 80 dB(C).

• Commercial Construction--no person shall cause, suffer, allow or permit sound from any source which, when measured from the real property boundary of the source of the sound, is in excess of a C-weighted sound pressure level of 75 dB(C), or impulsive sound which has a C-weighted sound pressure level of 80 dB(C).

Sound Measurement

Whether continuous or impulsive, sound shall be measured at approximately five (5) feet above grade, using a slow meter response setting and a windscreen when appropriate. 

Exception (Section 18-8)

Special Urgent Necessity--Except in case of urgent necessity in the interest of public health and safety, and then only with a permit from the building inspector, excavation, construction, demolition, repair, paving or alteration of buildings or streets in a residential use; noise regulations shall not apply or be enforced between the hours of 6:00 p.m. and 7:00 a.m where BOTH of the following apply.: 

• The building inspector determines that the public health and safety will not be impaired by the erection, demolition, alteration or repair of any building or the excavation of streets and highways between the hours of 6:00 p.m. and 7:00 a.m., and if; 

• The building inspector further determines that loss or inconvenience would result to any party in interest, he/she may grant permission for such work to be done between the hours of 6:00 p.m. and 7:00 a.m. upon application being made at the time the permit for the work is issued or during the progress of the work.

Violations

Each violation shall be considered a separate offense, and any violation continuing more than one-half (½) hour or reoccurring within one-half (½) hour shall be considered a separate offense for each half hour of violation.  Violations will result in one or more of the following: a stop work order being issued, monetary fines and may result in permit suspension or revocation. 

Introduction

The latest data available from the National Fire Protection Association indicates that 29% of fires in office buildings, 31% of fires in school properties, 30% of fires in religious buildings and similar occupancies, 13% of fires in stores or other mercantile uses, 50% of hotel and motel  and 83% of residential board and care facilities fires are caused by cooking equipment/activities.  To combat this problem, the 2018 International Building Code, in conjunction with the International Fire Code and International Mechanical Code contains provisions for the safe use of both commercial cooking equipment and domestic cooking equipment and activities in the aforementioned occupancies.

International Mechanical Code

In applying the regulations properly, it must first be understood what commercial cooking appliances and commercial foodservice establishments are defined as:

COMMERCIAL COOKING APPLIANCES. Appliances used in a commercial foodservice establishment for heating or cooking food. For the purpose of this definition, a commercial foodservice establishment is where food is prepared for sale or is prepared on a scale that is by volume and frequency not representative of domestic household cooking.

Commercial cooking appliances are typically found in: restaurants, cafeterias, institutional kitchens, charity kitchens, dormitory and barrack kitchens, cooking schools, church or fellowship hall kitchens, school kitchens, mercantile kitchens, banquet and catering facilities, bakeries, wholesale production kitchens, take-out pizza businesses, and even television studios.  Such uses of commercial appliances are typically used with intensity, even if infrequently, that has a higher heat content, a longer duration of cooking, and more grease-laden vapors.  Infrequent uses include cooking in a church fellowship hall for spaghetti dinners, fish fries and pancake breakfasts, daycare businesses providing cooked breakfasts or lunches for a large number of people as well as preparing food for sale, which can be classified as commercial cooking.  Domestic cooking, though not defined in the model code, is any cooking that is not taking place in a commercial foodservice establishment using commercial cooking appliances that resembles what and how you would cook at your own home.

Assembly Occupancies

The City of Knoxville classifies any cooking in an assembly occupancy as commercial cooking unless a warning placard, as directed by the City of Knoxville Fire Marshal, is provided. The following activities based on occupancy and intensity are also classified as commercial cooking:

• I-4, Institutional occupancies (child or adult daycare) with more than 12 occupants receiving cooked food.
• E-Educational occupancies with more than 12 occupants receiving cooked food.
• B-Business occupancies with commercial cooking equipment (unless a warning placard as directed by the City of Knoxville Fire Marshal, is provided).

Commercial Hood, Exhaust and Fire Protection

Commercial cooking requires an appropriate type of exhaust hood in accordance with IMC Section 506-COMMERCIAL KITCHEN HOOD VENTILATION SYSTEM DUCTS AND EXHAUST EQUIPMENT requiring either a Type I or II hood per Section 507-COMMERCIAL KITCHEN HOODS.  In addition, makeup air and fire suppression systems as detailed in Section 508 and 509 are necessary.

Domestic Cooking Appliances 

On occasion, cooking activities in commercial buildings take on a more domestic or residential type of use.  Cooking far less frequently, of shorter durations and at lower heat output results in a much lower production of grease-laden vapors and therefore a reduced risk of fire. Such activities in buildings other than Group R-Residential buildings are regulated by Section 505.6-DOMESTIC COOKING EXHAUST EQUIPMENT, where domestic cooktops, ranges, and open-top broilers are used for domestic purposes--domestic cooking exhaust systems shall be provided.  Examples of domestic cooking in a commercial building can be office break room range or oven, small daycare businesses, small tv studios featuring homestyle cooking instruction. The City of Knoxville classifies the following as domestic cooking:

• I-4, Institutional occupancies (Child or Adult Daycare) with 12 or fewer occupants receiving cooked food.
• E-Educational occupancies with 12 or fewer occupants receiving cooked food.
• B-Business occupancies with listed domestic equipment (listed above) and warning placard as directed by the City of Knoxville Fire Marshal.

Fire Marshal’s Office

Please contact the City of Knoxville Fire Marshal’s Office at 865-215-2283 for information regarding commercial/domestic cooking requirements and placards.

We look forward to assisting you in the timely completion of your project. If you have any questions please contact us at 865-215-2999 or by email: buildinginspections@knoxvilletn.gov.

CLICK HERE(PDF, 4MB) to access & print the City of Knoxville Handbook for Residential Swimming Pool Barriers. This PDF document contains helpful illustrations.

Each year, thousands of American families suffer swimming pool tragedies—drownings and near-drownings of young children. The majority of deaths and injuries in pools and spas involve young children ages 1 to 3 and occur in residential settings. These tragedies are preventable. This City of Knoxville booklet offers guidelines for pool barriers that can help prevent most submersion incidents involving young children. This handbook is designed for use by owners, purchasers, and builders of residential pools, spas, and hot tubs. Barriers are not the sole method to prevent pool drowning of young children and cannot replace adult supervision. Research evidence has been reviewed showing that climbing is an inevitable and integral part of childhood development; Climbing is involved in the child’s physical, psychological, and social development; Climbing skills are often taught and encouraged by parents, especially with boys, and climbing is a part of physical education at school.

CLICK HERE(PDF, 4MB) to access & print the City of Knoxville Handbook for Residential Swimming Pool Barriers. This PDF document contains helpful illustrations.

Overview

Changes in the way a building or structure is used, with or without any alterations or construction activity, can result in additional or different applications of City Zoning, Engineering and Building Code requirements.  Even seemingly simple changes such as: increasing the number of occupants, serving alcohol in places where it was not served before, creating ‘event space’ in an existing building, the re-arrangement of fixed chairs and tables, new interior finishes, changing circulation paths for building occupants, food service, the storage of new or different materials or changes of operations taking place in all or parts of a building--may trigger additional zoning, engineering or building requirements.  

Review, Inspection and Approval

Changes of use/activity or occupancy can, but not always, have significant zoning, engineering, utilities structural, fire protection, egress, mechanical or plumbing implications and therefore shall require City review, permitting, inspection and approval by the Plans Review and Inspections Department and the Fire Prevention Bureau before such changes/activities take place.  

Process

Through the City’s CERTIFICATION PERMIT application and process, staff will

1. Review the intended changes to the property, building or space to ensure the minimum requirements of the all codes and regulations are satisfied. 
2. After a CERTIFICATION PERMIT is approved and issued, staff will
3. Inspect the building or structure for compliance with the approved plan and use/occupancy as regulated by the 2018 International Existing Building Code and the 2018 International Fire Code.
4. Upon satisfactorily passing inspections, a new Certificate of Occupancy and, for assembly uses, a Fire Prevention Bureau “Assembly Occupancy Load Posting” will be issued which shall be posted in a conspicuous place, near the main exit or exit access doorway or as directed by the Fire Prevention Bureau. 

After completion of this process, you are free to use the property, building or space for the new use or activity.

Click here(PDF, 178KB) to view document.

Overview

Edges and ends of gypsum board and gypsum panel products shall occur on the framing members, except those edges and ends that are perpendicular to the framing members. Edges and ends of gypsum board and gypsum panel products shall be in moderate contact except in concealed spaces where fire-resistance-rated construction, shear resistance or diaphragm action is not required. Section 2508 of the IBC contains the requirements for gypsum construction1 

Moderate Contact

Joints between boards in fire-rated assemblies must be in “moderate contact,” meaning that the gypsum boards should be touching and gaps minimal. All gaps and joints in such assemblies must be properly taped and filled with compound. Around electrical boxes, the UL Fire Resistance Directory references no more than a 1/8” gap/joint, though in the field this can be difficult to attain and measure. All gaps must be filled with joint compound, fire-rated caulking or other materials/means suitable, per the local code authority. In non-rated construction, joints up to 1/4” tolerances are acceptable when filled with setting type, all-purpose joint compound. Note that the type of compound used to prefill gaps in the joints must be compatible with the compounds used to tape and finish the walls and/or ceiling.

Non-Rated or Rated Gypsum Assemblies

Gypsum board systems can either be non-rated or rated for fire, sound or shear resistance. Tolerances are set in many of the products and systems manufactured today. There are set tolerances for the installation of gypsum board. For many years, the construction standards for joints between adjacent panels of gypsum board have required the board edges and ends to be “in moderate contact”.  Moderate contact means that the board edges are essentially touching each other. It is possible for board edges to be in moderate contact yet not touch the entire length of the joint.

Non-Rated Construction (1/4 Inch Maximum)

Although good construction practices dictate that moderate contact should be the goal in both rated and non-rated systems, it has long been recognized that tolerances are needed for gypsum board joints in non-rated systems. The Gypsum Association has determined that joints in non-rated systems are permitted to be up to 1/4- inch in width at the widest point and must be pre-filled with joint compound. Up to 1/8-inch wide gaps can be filled with all-purpose or taping compound, either ready-mixed or setting type. Joints from 1/8 to 1/4- inch must be filled with setting type all-purpose or taping compound.

Fire Rated Systems (1/8th Inch Maximum)

Joints between gypsum boards in systems rated for fire must be constructed with the gypsum board edges and ends “in moderate contact”. This means the gypsum panels should be touching each other. Small gaps can be present along the joint, this is due in part to an allowable width tolerance in the manufacture of gypsum panels as stated in ASTM C-362 and that complete contact along the joint is near impossible. Further evidence is that the Underwriters Laboratory (UL) also allows for a 1/8-inch gap around electrical boxes in fire-rated partitions per the Fire Resistance Directory. The proper treatment of joints in fire-rated systems shall follow this guidance and be constructed in accordance with IBC Section 2508.5-Joint Treatment.3

1 2018 IBC 2508.3 Gypsum Construction--Single-Ply Application

2 ASTM C-36-STANDARD SPECIFICATION FOR GYPSUM WALLBOARD

3 2018 IBC 3608.5 Gypsum Construction--Joint Treatment.

Do I need a construction permit?

Generally, a construction permit is required. In accordance with Section 105-PERMITS of the 2018 International Building Code, the installation of fixed racks and storage fixtures requires a construction permit and City inspections prior to use (except for non-fixed and movable fixtures, cases and racks that are not over 5 feet 9 inches in height which are exempt from permits and inspections). Regardless of the need for a permit and inspections, rack storage presents special hazards to building occupants and firefighters; therefore all rack storage systems shall comply with the 2018 International Existing Building Code (IEBC), the International Building Code (IBC) and the International Fire Code (IFC). The following is a brief summary of the requirements for permitting for rack storage within the City of Knoxville:

Do I need an Architect or Engineer to design rack storage?

The design of rack storage shall be completed by a registered design professional under the following conditions:

1. Storage Occupancies--In Tennessee, where the principal use of a building or structure, or any portion thereof, for storage that is not classified as hazardous. A registered design professional is required where the building or structure is:
   1. Over two stories in height or
   2. Five thousand square feet or more in total gross area.

   Examples include, but not limited to: garages, warehouses, storage buildings, and freight depots. Buildings or structures not meeting these thresholds shall be permitted to have rack storage designed by a designer familiar with the requirements for rack storage.

2. Building Official Discretion--In accordance with Tennessee State Law, A building official has the discretion, however, to require the services of a registered architect or engineer for any project.
3. Tennessee State Law--Design professional requirements for all types of projects can be found here: Tennessee Board of Architectural and Engineering Examiners Requirements for Building Design

How do I obtain a construction permit?

The owner or owner’s authorized agent who intends to construct, enlarge, alter, repair, move, or demolish any rack storage systems regulated by the International Existing Building Code, International Building Code and International Fire Code shall first make application to the building official and obtain the required permit.

Step 1: To begin the permit process, please submit an application for commercial alteration. Access the permit catalog here.

Step 2: You will then be emailed a link to upload documents to our online plan review portal, KnoxPlans. Follow the plan upload guidelines provided to you, and please upload the documents referenced as required in this handout.

What do I need to submit for the construction permit application?

To obtain a permit review, in addition to a completed application, the owner or owner’s authorized agent shall provide construction documents, drawings and the following information for City review:

1. Means of Egress Design--Rack storage systems may change the circulation paths of the occupants and or affect the operation of life safety systems and therefore the following information shall be provided for permit review (IEBC 106.2.3):
   • The construction documents for rack storage constituting one of the following: ALTERATIONS--LEVEL 2, ALTERATIONS--LEVEL 3 or ADDITIONS shall show in sufficient detail the location, construction, size and character of all portions of the means of egress in compliance with the provisions of the IEBC.
   • The construction documents shall designate the number of occupants to be accommodated in every work area of every floor and in all affected rooms and spaces being constructed to store materials in accordance with IEBC Section 106.2.3 and shall be submitted with the permit application.
2. Hazardous Materials Information Required--Per IBC Section 414.1.3, when hazardous materials are intended to be stored, a report shall be submitted to the building official with the permit application containing the following information:
   • Identifying the maximum expected quantities of hazardous materials to be stored (or lack thereof in the case of the storage of non-hazardous materials), used in a closed system and used in an open system, and subdivided to separately address hazardous material classification categories based on IBC Tables 307.1(1) and 307.1(2).
   • The methods of protection from such hazards, including but not limited to control areas, fire protection systems and Group H occupancies shall be indicated in the report and on the construction documents.
   • The opinion and report shall be prepared by a qualified person, firm or corporation approved by the building official and provided without charge to the enforcing agency.
   • For buildings and structures with an occupancy in Group H, separate floor plans shall be submitted identifying the locations of anticipated contents and processes so as to reflect the nature of each occupied portion of every building and structure.
3. Hazardous Materials Inventory Statement (HMIS)--In accordance with IFC Section 5001.5.2, Where required by the fire code official, an application for a permit shall include an HMIS, such as Superfund Amendments and Reauthorization Act of 1986 (SARA) Title III, Tier II Report or other approved statement (Please contact the City of Knoxville Fire Marshal for information). The HMIS shall include the following information:
   1. Product name.
   2. Component.
   3. Chemical Abstract Service (CAS) number.
   4. The location where stored or used.
   5. Container size.
   6. Hazard classification.
   7. Amount in storage.
   8. Amount in use-closed systems.
   9. Amount in use-open systems.
4. High Piled Combustible Storage--Where rack storage constitutes high piled combustible storage, (High Piled Combustible Storage is: Storage of combustible materials in closely packed piles or combustible materials on pallets, in racks or on shelves where the top of storage is greater than 12 feet in height. Where required by the fire code official, high-piled combustible storage also includes certain high-hazard commodities, such as rubber tires, Group A plastics, flammable liquids, idle pallets and similar commodities, where the top of storage is greater than 6 feet in height). Plans and specifications in addition to the information required by the International Building Code, the storage permit submittal shall include all of the following as required by IFC Section 3201.3:
   1. Floor plan of the building showing locations and dimensions of high-piled storage areas.
   2. Usable storage height for each storage area.
   3. Number of tiers within each rack, if applicable.
   4. Commodity clearance between the top of storage and the sprinkler deflector for each storage arrangement.
   5. Aisle dimensions between each storage array.
   6. Maximum pile volume for each storage array.
   7. Location and classification of commodities in accordance with IFC Section 3203.
   8. Location of commodities that are banded or encapsulated.
   9. Location of required fire department access doors.
   10. Type of fire suppression and fire detection systems.
   11. Location of valves controlling the water supply of ceiling and in-rack sprinklers.
   12. Type, location and specifications of smoke removal and curtain board systems.
   13. Dimension and location of transverse and longitudinal flue spaces.
   14. Additional information regarding required design features, commodities, storage arrangement and fire protection features within the high-piled storage area shall be provided at the time of permit when required by the fire code official.
5. Fire Protection Systems--Please contact the City of Knoxville Fire Marshal’s Office at 865-215-2283 for information regarding required fire protection systems, permit application, review and inspections.

What inspections do I need?

Special Inspections:

1. Special Inspections for Storage Racks--Periodic special inspection is required for the anchorage of storage racks that are 8 feet or greater in height in structures assigned to Seismic Design Category D, E or F. (Such special inspections are in addition to the City Inspections and are not a replacement but intended to be in parallel.) (IBC 1705.12.7).
2. Special Inspector Qualifications--Where special inspections are required for storage racks that are 8 feet or greater in height, prior to the start of the construction, the approved agencies shall provide written documentation to the building official demonstrating the competence and relevant experience or training of the SPECIAL INSPECTOR(S) who will perform the SPECIAL INSPECTIONS and tests during construction.
   • Experience or training shall be considered to be relevant where the documented experience or training is related in complexity to the same type of special inspection or testing activities for projects of similar complexity and material qualities. These qualifications are in addition to qualifications specified in other sections of this code.
   • The registered design professional in responsible charge and engineers of record involved in the design of the project are permitted to act as the approved agency and their personnel are permitted to act as SPECIAL INSPECTORS for the work designed by them, provided they qualify as SPECIAL INSPECTORS. (IBC 1704.2.1)

City Inspections:

1. Before use and upon completion of rack system construction, alteration, addition or repair, and after the required fire inspections and special inspections have been completed and approved, the owner or owner’s authorized agent shall notify the building official when work is ready for inspection and request a final inspection per IBC Section 110.3.11.

Fire Inspections:

1. Please contact the City of Knoxville Fire Marshal’s Office at 865-215-2283 for information regarding fire inspection requirements.

In accordance with the 2018 International Residential Code, one/two-family dwellings and townhouses shall require construction permit(s) unless exempted from such as given in R105.2 below. Exemption from permits shall not presume to give authority to violate or cancel the provisions of the IRC, ZONING or other ordinances of the City of Knoxville.

R105.1 Permit(s) Required

Any owner or owner’s authorized agent who intends to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by this code, or to cause any such work to be performed, shall first make application to the building official and obtain the required permit. Sidewalks and driveways in the Public Right-of-Way require a building permit.

R105.2 Work exempt from permit 

Exemption from building permit requirements of this code shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction. Most projects still require application and review to confirm an exemption from permit requirements. Exemptions may be provided for the following:

Building:

1. One-story detached accessory structures, provided that the floor area does not exceed 200 sq.ft.
2. Fences not over 7 feet high.
3. Retaining walls that are not over 4 feet in height measured from the bottom of the footing to the top of the wall, unless supporting a surcharge.
4. Water tanks supported directly upon grade if the capacity does not exceed 5,000 gallons and the ratio of height to diameter or width does not exceed 2 to 1.
5. Painting, papering, tiling, carpeting, cabinets, countertops and similar finish work.
6. Prefabricated swimming pools that are less than 24 inches deep.
7. Swings and other playground equipment.
8. Window awnings supported by an exterior wall that do not project more than 54 inches from the exterior wall and do not require additional support.
9. Decks not exceeding 200 square feet in area, that are not more than 30 inches above grade at any point, are not attached to a dwelling and do not serve the exit door required by Section R311.4. 

Electrical:

1. Listed cord-and-plug connected temporary decorative lighting.
2. Reinstallation of attachment plug receptacles but not the outlets therefore.
3. Replacement of branch circuit overcurrent devices of the required capacity in the same location.
4. Electrical wiring, devices, appliances, apparatus or equipment operating at less than 25 volts and not capable of supplying more than 50 watts of energy.
5. Minor repair work, including the replacement of lamps or the connection of approved portable electrical equipment to approved permanently installed receptacles.

Gas:

1. Portable heating, cooking or clothes drying appliances.
2. Replacement of any minor part that does not alter approval of equipment or make such equipment unsafe.
3. Portable-fuel-cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.

Mechanical:

1. Portable heating appliances.
2. Portable ventilation appliances.
3. Portable cooling units.
4. Steam, hot- or chilled-water piping within any heating or cooling equipment regulated by this code.
5. Replacement of any minor part that does not alter approval of equipment or make such equipment unsafe.
6. Portable evaporative coolers.
7. Self-contained refrigeration systems containing 10 pounds or less of refrigerant or that are actuated by motors of 1 horsepower or less.
8. Portable-fuel-cell appliances that are not connected to a fixed piping system and are not interconnected to a power grid.

Plumbing:

1. The stopping of leaks in drains, water, soil, waste or vent pipe; provided, however, that if any concealed trap, drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the same with new materials such work shall be considered as new work and a permit shall be obtained and inspection made as provided in this code.
2. The clearing of stoppages or the repairing of leaks in pipes, valves or fixtures, and the removal and reinstallation of water closets, provided such repairs do not involve or require the replacement or rearrangement of valves, pipes or fixtures.

R105.3 Application for Permit. 

To obtain a permit, the applicant shall first file an application therefor in writing on a form furnished by the Plans Review and Inspection Department for that purpose. Such application shall:

1. Identify and describe the work to be covered by the permit for which application is made.
2. Describe the land on which the proposed work is to be done by legal description, street address or similar description that will readily identify and definitely locate the proposed building or work.
3. Indicate the use and occupancy for which the proposed work is intended.
4. Be accompanied by construction documents and site plan for plan review and other information as required in Section R106.1.

5. State the valuation of the proposed work.

Special Inspection Requirements

Special inspection requirements are detailed in the 2018 International Building Code, Chapter 17-SPECIAL INSPECTIONS AND TESTS.  Special inspections are required inspections of a highly technical nature requiring special knowledge and experience of which are typically outside the normal expertise of municipal inspectors.  These inspections are both periodic and continuous depending on the type of work, as outlined by the registered design professional in the Statement of Special Inspections required by IBC Section 1704.3 included within the City approved construction drawings/documents. Special inspections shall be at the expense of the permit holder.

Progress Reports

The special inspector shall complete written inspection reports for each inspection visit and provide the reports on a timely basis as determined by the building official, i.e. spray applied fireproofing requiring special inspection shall have such inspection completed and approved by the special inspector, the registered design professional in responsible charge and the building official before the fireproofing is concealed by building finishes, etc. The special inspector or inspection agency shall furnish these reports directly to the building official and to the design professional in responsible charge (IBC Section 1704.2.4). These reports should be organized in a daily format and may be submitted monthly at the option of the building official. Special inspection reports shall be subject to review and approval/disapproval by the building official for due cause.  As the review of special inspection reports requires time to complete, in order to avoid delays in obtaining a Certificate of Occupancy, a FINAL REPORT shall be submitted to the registered design professional in responsible charge for review and approval and then to the City of Knoxville in a timely fashion. 

Final Report

Special inspectors or inspection agencies shall submit a final signed report to the building department stating that all items requiring special inspection and testing by the Statement of Special Inspection were fulfilled and reported and, to the best of their knowledge, in conformance with the approved plans and specifications. Items not in conformance, unresolved items or any discrepancies in inspection coverage (i.e., missed inspections, periodic inspection when continuous was required, etc.) should be specifically itemized in this report. If the special inspector is a registered design professional, said professional shall seal, sign and date the final report. Before a Certificate of Occupancy is granted, the registered design professional in responsible charge shall sign the report, or a copy of the report as evidence of compliance with IBC 1704.2.4 before it is submitted to the building official for review and approval.

Report Contents

In progress reports and the final report, special inspectors should provide the following information as a minimum: 

• Job Address--As it appears on the approved building permit.
• Permit Number--List all the permit number(s) for the work performed. There is sometimes more than one permit issued for large projects (i.e. foundation and superstructure under separate permits).
• Name of Special Inspector.
• Location of Inspection--For field inspections, pinpoint the exact location of inspection using grid lines, floor numbers, or other applicable identification.
• Identification of Materials and Methods of Construction--Adequately identify materials and note the methods of construction, erection, placement or other use of the materials. Describe specific items that were inspected. (moment frames, footings, retaining walls, etc,)
• Testing Data--Identify and document results of all material testing, treatment certificates, nondestructive testing, load test, sampling, welding qualifications, or other tests being utilized (where applicable).
• Conformance Statement--State whether the work requiring special inspections was either in conformance or not in conformance with these guidelines and the building official approved plans and specifications.
• Identify and document any structural design changes approved by the Architect or Registered Design Professional.
• Identify and document any work completed without required in-process special inspection.
• Substitutions and Deviations--All substitutions of materials or other deviations from approved permit plans and applicable standards and codes shall be immediately reported to the contractor for correction, then, if uncorrected, to the Architect, Engineer, owner, and Building Official. All non-conforming items shall be fully identified on the reports.

Report Submission and Review

Third-party inspections shall not presume to give authority to violate or cancel the provisions of the building code or other ordinances of the jurisdiction.  The City reserves the right to accept or reject third-party special inspections and reports for due cause. Special Inspection reports shall be submitted for review via email to the City of Knoxville, Chief Building Inspector James M. Tente at: jtente@knoxvilletn.gov.

General

In general, State Law (Tenn. Code Ann. § 62-2-101) requires that ALL structures shall have plans prepared by design professionals registered by the State of Tennessee.  See below for exceptions to this rule.  For more information or to verify a license see:  Tennessee Architects & Engineers 

One and Two-Family Dwellings/Townhouses Exemption

One-family, two-family dwellings, townhouses and accessory outbuildings pertaining thereto; and farm buildings not designed or intended for human occupancy are projects where a registered architect or engineer is NOT required where designed in accordance with the 2018 International Residential Code.

Assembly, Educational or Institutional Occupancies

In NO case can anyone other than an architect or engineer registered in Tennessee provide design documentation with regard to A-Assembly, I-Institutional, and E-Educational occupancies:

• Assembly Occupancies (A) - buildings or structures, or any portion thereof, for the gathering of persons for purposes such as civic, social, or religious functions or for recreation, food or drink consumption, or awaiting transportation, having a calculated occupant load of 50 or more persons (Calculated in accordance with 2018 IBC Section 1004-OCCUPANT LOAD). A registered design professional is required to prepare plans and specifications for this type of occupancy regardless of the size of the facility. Examples include but are not limited to: amusement park buildings, auditoriums, churches, synagogues, mosques, dance halls, coffee shops, event centers, exercise gyms, martial arts studios, motion picture theaters, museums; passenger depots, public assembly halls, public pools and restaurants.

• Educational Occupancies (E) - use of a building or structure, or any portion thereof, for the gathering together of persons for the purpose of instruction. A registered design professional is required to prepare plans and specifications for this type of occupancy regardless of the size of the facility. Examples include: public and private schools; colleges; universities, academies and daycare facilities.

• Institutional Occupancy (I) - A registered design professional is required to prepare plans and specifications for this type of occupancy regardless of the size of the facility: 

1. Unrestrained occupancy - use of a building or structure, or any portion thereof, for the purpose of providing medical care and sleeping facilities for four or more persons who are mostly incapable of self-preservation because of physical or mental disability; examples include: hospitals, nursing homes, mental institutions (restrained and unrestrained) and nursery facilities providing full time 24- hour care for persons under six years of age. 

2. Restrained occupancy - use of a building or structure, or any portion thereof, for the purpose of providing sleeping facilities for four or more persons who are confined or housed under some degree of restraint or security; examples include: jails, detention centers, correctional institutions, reformatories, pre-release centers and other residential-restrained care facilities.

Other than One and Two-Family Dwellings/Townhouses

Structures classified as "business," "factory-industrial," "hazardous," "mercantile," "residential" and "storage" occupancies, as such occupancies are defined in the 1985 edition of the Standard Building Code, which are: 

1. Three or more (3) stories in height; OR  

2. Greater than five thousand square feet (5,000 sq. ft.) in total gross floor area. 

MUST have plans/specifications prepared by design professionals registered by the State of Tennessee.

Design Professional Exemptions 

 The State of Tennessee has exemptions to the general rule requiring a Registered Design Professional; The following are situations where a registered architect, engineer, or landscape architect is NOT required unless the City of Knoxville deems it necessary (IRC R106.1/IBC 107.3.4/IEBC 106.6): 

1. Tenant finishes and tenant improvements (alterations) to a building of B, F, H, R, M, or S occupancy may be designed by a non-registrant when meeting BOTH of the following conditions: 

   1. Each separate tenant space is less than 5,000 square feet and the tenant spaces are separated from other tenant spaces by the minimum fire-rated separation required by the applicable code. 

   2. Remodeling, maintenance, or renovation of any building or structure, which does not alter the structural system, fire protection systems, or means of egress requirements. 

2. The following exemptions apply to buildings, structures and spaces of B, F, H, R, M, or S occupancy that are 5,000 square feet or greater in total gross area or greater than two stories in height: 

   1. Existing Interior Space. Normal maintenance or remodeling of existing interior space in an existing building where the occupancy or floor plan do not change but upgrades are needed, such as, remove and replacing finishes (wall, floor, ceiling, where these are not a part of a required fire-rated assembly), change light bulbs or filters, and rearrange prefabricated partitions. 

   2. Mechanical Design. 1. The design of a mechanical system for a building or structure of B, F, H, R, M, or S occupancy, and a temporary structure, wherein the HVAC system developed is not more than a total of 12.5-ton capacity and not more than a total of 500,000 BTU of heating per hour output. 2. Normal maintenance or replacement of defective mechanical equipment with like and kind equipment of the same size may be accomplished by contractors licensed in their respective trades. 

   3. Plumbing Design. Minor plumbing upgrades and additions up to the equivalent of three (3) fixture unit values, which do not require any change to the capacity of any waste, vent or supply system. 

   4. Electrical Design. Minor electrical additions, such as receptacles, lighting, or other circuits, not to exceed 20 amperes, may be designed without the benefit of a registrant, if the additional circuits do not require additional distribution panel(s) and/or the need for upgrading, resizing, or enlarging branch circuits and main feeders or the design of electrical installations of less than eight hundred (800) amperes.

   5. Roof Alteration or Repair. Normal maintenance or repair of an existing roof where the weight, drainage, fire protection, and other code-related requirements of the original design are not changed or compromised; A registered architect or engineer is NOT required unless The City of Knoxville deems it necessary (IBC 107.3.4/IEBC 106.6). 

Roof Replacement/Reroofs

A qualified registrant is REQUIRED  for roof replacements or reroofs of all buildings of 5,000 square feet or more or greater than two stories in height. When a roof is replaced, structural loads during and after installation can change, energy requirements may be affected, drainage conditions can change, etc.

Landscaping

Landscape design drawings are required to be prepared and sealed by a State of TN registrant when: 

1. Associated with new and existing construction of buildings of 5,000 square feet or more or greater than two stories.

2. For non-building/landscape-related projects where site improvements are 5,000 square feet or more in area, a registrant is required.

When sealed drawings are necessary, a registrant other than a Landscape Architect may prepare and seal landscape design drawings provided they are qualified by education or experience.  The building official should not be called upon to judge competence but, if at any time he or she is confronted with the suspicion of incompetence, a registered Landscape Architect will be required.  In addition, under Tennessee law, a registrant may not take over, review, revise, or place his or her seal on plans and specifications begun by other persons (landscape company/horticulturist/landscape designer). A registrant may seal only work that he or she has prepared or which has been prepared under his or her responsible charge. 

Signs

Signs that exceed either of the following limits MUST have plans/specifications prepared by design professionals registered by the State of Tennessee: 

(i) Any portion of the sign is twenty feet (20') or more above the ground level; or 

(ii) Any portion of the sign is fifteen feet (15') or more above the ground level if the sign has more than one hundred twenty square feet (120 sq. ft.) in total sign face area.

Professional Registration

Professional registration imposes on the registrant an obligation to protect the safety, health, and welfare of the public and to render competent service. A primary part of that obligation is the recognition on the part of the registrant of the limit of the registrant's professional competence and the voluntary limitation of professional assignments to activities for which the registrant is qualified by education or experience. The "Rules of Professional Conduct," which carry the enforcement of law, specify the proper conduct of practice (or title in the case of registered interior designers), service in areas of competence, the need for objectivity and truth in public statements, the avoidance of conflicts of interest and improper acceptance of work, and misconduct in practice.

Tennessee Architecture Reference Manual

The State of Tennessee has produced a handy reference manual: TN Architecture Reference Manual

General

In accordance with the 2018 International Residential Code Section R109-INSPECTIONS, the City of Knoxville inspection staff is required to inspect various elements of one and two-family dwellings, including townhouses, during various stages of construction.  Required inspections include, but are not limited to: footings, foundations, floodplain inspections, underground: plumbing, electrical, mechanical and gas piping, fire separation/firewall construction, insulation, rough: plumbing, electrical, mechanical, gas piping, shower pan, rough framing, final inspections for trade work and final building inspections prior to occupancy.

Third-Party Inspections

Third-party inspections, inspections by other than the City of Knoxville staff shall not be permitted in place of the required inspections listed above except in the case of exigent and extenuating circumstances. Prior to construction, the Building Official is authorized to allow third-party inspectors in place of City inspections where it is found that third-party inspections are warranted.  Such permission is required in advance and may be permitted only on a case-by-case basis where the third-party inspection agency is approved and satisfies the City’s requirements for qualifications and reliability. Permission for third-party inspection is reviewed, in advance, by Chief Building Inspector, James Tente via email request. Each instance of a third-party inspection request will be reviewed individually and either be approved or denied by the Building Official.

Third-Party Quality and Reliability

Third-party inspection approval is contingent on the demonstrated quality of the inspector's experience, knowledge, adherence to the approved construction documents and past performance.  Third-party inspection quality shall meet or exceed that of the City staff inspections and shall verify that the construction generally conforms to the City approved construction documents and drawings.  The Building Official reserves the right to deny approval of third-party inspectors/inspection agencies for due cause.

Limitations

Third-party inspections shall not presume to give authority to violate or cancel the provisions of the IRC or other ordinances of the jurisdiction.  The third-party agency shall not be the owner, owner's authorized agent or contractor (or employee) listed on the construction permit. 

Report Contents

**Inspection reports shall provide the following information at a minimum: 

• Job Address--As it appears on the approved building permit.
• Permit Number(s)--List all the permit number(s) for the work inspected.
• Inspector(s)--Name of third-party inspector(s) and Official Seal, Signature and TN License #.
• Description of Inspection--Describe what was inspected, approved, corrections made.
• Photo(s)--Digital photograph(s) of what elements were inspected and approved.

• Confirmation Statement--Statement that the work inspected was, “Found to generally conform to the City Stamped and Approved construction documents.”

** or as otherwise agreed upon in advance.

Third-Party Inspection Review, Approval, or Denial  

Upon completion of a third-party inspection, the inspector/permit holder shall submit a report of findings via email to Chief Building Inspector, James Tente for review and approval.  Results of the inspection will be recorded in the City’s permit records. The building official, upon notification, shall either indicate the portion of the construction that is satisfactory as completed or shall notify the permit holder or an agent of the permit holder wherein the same fails to comply with this code. 

Corrections and Follow-Up Inspection

Where the third-party inspection report reveals defects or code violations, any portions that do not comply shall not be covered or concealed until corrections are made and a follow-up inspection is performed by City of Knoxville Inspectors only. Work shall not be done beyond the point indicated in the third-party inspection report without first obtaining the approval of the Building Official.

General

In accordance with the 2018 International Residential Code Section R109-INSPECTIONS, the City of Knoxville inspection staff is required to inspect various elements of one and two-family dwellings, including townhouses, during various stages of construction.  Required inspections include, but are not limited to: footings, foundations, floodplain inspections, underground: plumbing, electrical, mechanical and gas piping, fire separation/firewall construction, insulation, rough: plumbing, electrical, mechanical, gas piping, shower pan, rough framing, final inspections for trade work and final building inspections prior to occupancy.

Third-Party Inspections

Third-party inspections, inspections by other than the City of Knoxville staff shall not be permitted in place of the required inspections listed above except in the case of exigent and extenuating circumstances. Prior to construction, the Building Official is authorized to allow third-party inspectors in place of City inspections where it is found that third-party inspections are warranted.  Such permission is required in advance and may be permitted only on a case-by-case basis where the third-party inspection agency is approved and satisfies the City’s requirements for qualifications and reliability. Permission for third-party inspection is reviewed, in advance, by Chief Building Inspector, James Tente via email request. Each instance of a third-party inspection request will be reviewed individually and either be approved or denied by the Building Official.

Third-Party Quality and Reliability

Third-party inspection approval is contingent on the demonstrated quality of the inspector's experience, knowledge, adherence to the approved construction documents and past performance.  Third-party inspection quality shall meet or exceed that of the City staff inspections and shall verify that the construction generally conforms to the City approved construction documents and drawings.  The Building Official reserves the right to deny approval of third-party inspectors/inspection agencies for due cause.

Limitations

Third-party inspections shall not presume to give authority to violate or cancel the provisions of the IRC or other ordinances of the jurisdiction.  The third-party agency shall not be the owner, owner's authorized agent or contractor (or employee) listed on the construction permit. 

Report Contents

**Inspection reports shall provide the following information at a minimum: 

• Job Address--As it appears on the approved building permit.
• Permit Number(s)--List all the permit number(s) for the work inspected.
• Inspector(s)--Name of third-party inspector(s) and Official Seal, Signature and TN License #.
• Description of Inspection--Describe what was inspected, approved, corrections made.
• Photo(s)--Digital photograph(s) of what elements were inspected and approved.
• Confirmation Statement--Statement that the work inspected was, “Found to generally conform to the City Stamped and Approved construction documents.”

** or as otherwise agreed upon in advance.

Third-Party Inspection Review, Approval, or Denial 

 Upon completion of a third-party inspection, the inspector/permit holder shall submit a report of findings via email to Chief Building Inspector, James Tente for review and approval.  Results of the inspection will be recorded in the City’s permit records. The building official, upon notification, shall either indicate the portion of the construction that is satisfactory as completed or shall notify the permit holder or an agent of the permit holder wherein the same fails to comply with this code. 

Corrections and Follow-Up Inspection

Where the third-party inspection report reveals defects or code violations, any portions that do not comply shall not be covered or concealed until corrections are made and a follow-up inspection is performed by City of Knoxville Inspectors only. Work shall not be done beyond the point indicated in the third-party inspection report without first obtaining the approval of the Building Official.

Purpose

The following is a summary of codes and regulations with respect to the construction of “tiny homes”. Please note: This is not intended to be an all-inclusive list of requirements. For any specific requirements please refer to the City of Knoxville Zoning Ordinances, 2018 International Residential Code - Appendix Q-TINY HOMES and/or the State of Tennessee Modular Building Program. For specific questions regarding your tiny home project please contact our office at (865) 215-2999.

What is a "Tiny House"?

A "tiny house" is defined by Section AQ102 of the 2018 International Residential Code as being a site built dwelling that is 400 square feet or less in floor area excluding lofts. Tiny houses regulated by the International Residential Code are NOT fabricated in a different location and relocated to a lot within the City of Knoxville. Structures built in accordance with the ANSI A119.5: Park Model Recreational Vehicle Standard, whether custom built or mass-produced, are not suitable as dwellings within the City of Knoxville's jurisdiction.

What is a Manufactured "Tiny House"?

Any dwelling built off-site is a modular home and is regulated under the Tennessee Modular Buildings Act. This program is under the authority of Tennessee Code Annotated 68-126-301. The Tennessee Modular Buildings Act was established in 1985 with the purpose of establishing building construction standards for factory-built structures. The program includes housing that is produced in factories and transported to building sites to be installed. The Manufacturers of such "tiny" modular homes are/shall be licensed by the State of Tennessee, regulated under the supervision of the state program, and are required to have a permanently affixed Tennessee modular building label. The label is required to be attached by means of four (4) pop rivets or drive screws, on a permanent non-removable building component as evidence of compliance with the program. Manufactured "mobile homes" (permanently constructed on a frame with wheels) are excluded from the program. The regulation of manufactured "mobile homes" is the responsibility of the U. S. Department of Housing and Urban Development (HUD). Nonconforming single-wide manufactured "mobile homes" are only permitted in APPROVED mobile home parks within the City of Knoxville.

Permit and Inspection Requirements

Any new construction will generally require the submission of construction drawings and a site plan (drawn to scale or dimensioned to all lot lines other structures on the same lot) indicating how the tiny house will be constructed and where it will be located on the building site.  Knoxville’s GIS System is a good resource for property/site information. Upon approval, appropriate building and sub-trade permits may be issued at which time work may begin. Structures shall be inspected by City of Knoxville inspections throughout the construction process. No structure shall be occupied without a Certificate of Occupancy, which is issued after passing final inspection by the City of Knoxville.