General Information

Modular Building Program

 This program is under 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, in addition to housing, all business and commercial buildings that are mass-produced in factories and then transported to building sites to be installed. Manufactured (mobile) homes are excluded from the program. Their regulation is the responsibility of the U. S. Department of Housing and Urban Development (HUD). 

State of TN Modular Building Program

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State Contact Information

 Tennessee Department of Commerce and Insurance
Division of Fire Prevention
Manufactured Housing Section
500 James Robertson Parkway
Nashville, Tennessee 37243-1162

Phone: 615-741-7192
Fax: 615-741-9388

Statutory References and Process Resources

Tennessee Code Annotated

 Statutory Reference
Title 68

Health, Safety and Environmental Protection Safety
Chapter 126 Manufactured Homes

Part 3 Tennessee Modular Building Act

Rule & Regulation

  CHAPTER 0780-02-13

MODULAR BUILDING UNITS  


Tennessee Modular Building Rules


Builder Accessibility Guidance Resources

How States Incorporate Accessibility Standards

TN Public Buildings Accessibility Act

TN Public Buildings Accessibility Rules

General Information

Modular housing is one of the fastest growing sectors of the construction industry. Modular home building technology is a process, and is currently utilized for single-family and multifamily residential applications.


  • Traditionally found in the Eastern U.S., the modular housing industry has begun to make tremendous inroads across the country, evidence of its broadening appeal to builders, developers, and consumers.


  • A modular home is constructed of building materials in a controlled factory setting. The factory setting allows manufacturers of modular homes to use automated and technologically advanced systems and machinery in an assembly-line fashion.


  • Modular homes are built to the exact same prescriptive building codes that local home-builders meet. It is the job of the manufacturer and the local builder to design each individual home to the local building code. Modular homes are also built using the exact same building materials in site-built homes.


  • A state certified or third party inspector will inspect the homes during the factory construction phase. A local inspector inspects all work done on-site, both prior to module erection and assembly, and any work completed thereafter.


  • A modular home manufacturer works directly with a dealer/builder/general contractor. A successful PARTNERSHIP between a modular manufacturer and a local builder/dealer or general contractor is absolutely necessary for a successful modular home project.


  • Once built, the home is then transported to the home site where assembly occurs and the home is completed and finished by the builder.


  • A modular manufacturer builds the home components in modules. A modular builder takes the modules and turns them into a home.


  • By building off-site, a modular home manufacturer creates greater efficiency and allows builders to become more productive, thereby building more homes and creating jobs locally.


  • The building industry will always be plagued by untimely weather delays, fluctuating and unpredictable material costs, and skilled labor shortages. The off-site, factory-built modular housing process helps alleviate and control the known variables that hassle builders daily.


  • According to the U.S. Census Bureau, 50% of all residential builders cited a shortage of carpenters. By the year 2020, according to government data, there will be a need for an additional 1.1 million special trades contractors.


  • On-time and volume purchasing enables manufacturers to build homes at a reduced cost, which then are passed onto the consumer. More importantly, the modular construction process saves time. By shortening the construction time, a builder is better able to manage the soft costs of construction, thereby increasing efficiencies and saving money, which again is passed onto the consumer.


  • Modular homes are appraised and financed exactly in the same manner as site-built homes. Most jurisdictions zone and treat modular homes as any other residential structure, and the industry is educating those jurisdictions that may act differently.