| Alabama |
Alabama Manufactured Housing Commission regulates modular units. |
Local building departments issue permits. |
Requires compliance with Alabama Building Code. |
| Alaska |
No statewide modular program; local jurisdictions enforce codes. |
Local building departments issue permits. |
Reciprocity often required for out-of-state units. |
| Arizona |
Arizona Dept. of Housing regulates factory-built buildings. |
Local building departments issue permits. |
Certification required for in/out-of-state units. |
| Arkansas |
Arkansas Manufactured Home Commission regulates modular homes. |
Local building departments issue permits. |
Independent inspections required. |
| California |
Dept. of Housing and Community Development certifies modular units. |
Local building departments issue site permits. |
Detailed approval process. |
| Colorado |
Colorado Division of Housing certifies modular/factory-built structures. |
Local building departments issue permits. |
Plan approval required before construction. |
| Connecticut |
State Building Inspector certifies modular units. |
Local building departments issue permits. |
Requires compliance with State Building Code. |
| Delaware |
No statewide modular program; local jurisdictions regulate. |
Local building departments issue permits. |
Reciprocity with neighboring states. |
| Florida |
Dept. of Business and Professional Regulation Modular Program approves units. |
Local jurisdictions issue permits. |
Must meet hurricane resilience standards. |
| Georgia |
Georgia Dept. of Community Affairs oversees the modular program. |
Local building departments issue permits. |
Requires compliance with Georgia State Codes. |
| Hawaii |
No statewide modular program; county building departments regulate. |
County jurisdictions issue permits. |
Must meet Hawaii Building Code. |
| Idaho |
Division of Building Safety certifies modular units. |
Local building departments issue permits. |
Requires insignia of approval. |
| Illinois |
Dept. of Public Health oversees modular program. |
Local building departments issue permits. |
Compliance with Illinois Building Code. |
| Indiana |
Dept. of Homeland Security Industrialized Building Systems Program certifies modular units. |
Local building departments issue permits. |
Requires compliance with 675 IAC Article 15. |
| Iowa |
State Building Code Bureau certifies modular units. |
Local building departments issue permits. |
Requires compliance with Iowa Building Code. |
| Kansas |
Kansas Housing Resources Corp. oversees modular housing. |
Local building departments issue permits. |
HUD Code compliance required. |
| Kentucky |
Dept. of Housing, Buildings and Construction certifies modular units. |
Local building departments issue permits. |
Requires compliance with Kentucky Building Code. |
| Louisiana |
Manufactured Housing Commission regulates modular units. |
Local building departments issue permits. |
Requires compliance with Louisiana Building Code. |
| Maine |
Manufactured Housing Board certifies modular units. |
Local building departments issue permits. |
Requires compliance with Maine Uniform Building Code. |
| Maryland |
Dept. of Housing and Community Development certifies modular units. |
Local building departments issue permits. |
Requires insignia of approval. |
| Massachusetts |
Board of Building Regulations and Standards certifies modular units. |
Local building departments issue permits. |
Requires compliance with Massachusetts State Building Code. |
| Michigan |
Bureau of Construction Codes certifies modular units. |
Local building departments issue permits. |
Requires state seal of approval. |
| Minnesota |
Dept. of Labor and Industry certifies modular units. |
Local building departments issue permits. |
Requires compliance with Minnesota Building Code. |
| Mississippi |
Manufactured Housing Division regulates modular units. |
Local building departments issue permits. |
Requires compliance with Mississippi Building Code. |
| Missouri |
Public Service Commission certifies modular units. |
Local building departments issue permits. |
Requires compliance with Missouri Building Code. |
| Montana |
Dept. of Labor and Industry certifies modular units. |
Local building departments issue permits. |
Requires insignia of approval. |
| Nebraska |
Public Service Commission certifies modular units. |
Local building departments issue permits. |
Reciprocity with other states. |
| Nevada |
Manufactured Housing Division certifies modular units. |
Local building departments issue permits. |
Requires compliance with Nevada Building Code. |
| New Hampshire |
State Fire Marshal certifies modular units. |
Local building departments issue permits. |
Requires compliance with New Hampshire Building Code. |
| New Jersey |
Dept. of Community Affairs certifies modular units. |
Local building departments issue permits. |
Requires compliance with New Jersey Uniform Construction Code. |
| New Mexico |
Construction Industries Division certifies modular units. |
Local building departments issue permits. |
Requires compliance with New Mexico Building Code. |
| New York |
Dept. of State certifies modular units. |
Local building departments issue permits. |
Requires compliance with Uniform Code and Energy Code. |
| North Carolina |
Dept. of Insurance certifies modular units. |
Local building departments issue permits. |
Requires compliance with North Carolina Building Code. |
| North Dakota |
Division of Community Services certifies modular units. |
Local building departments issue permits. |
Requires compliance with North Dakota Building Code. |
| Ohio |
Board of Building Standards certifies modular units. |
Local building departments issue permits. |
Regulated since 1970s. |
| Oklahoma |
Uniform Building Code Commission regulates modular units. |
Local jurisdictions issue permits. |
HUD Code compliance emphasized. |
| Oregon |
Building Codes Division certifies modular units. |
Local building departments issue permits. |
Requires compliance with Oregon Building Code. |
| Pennsylvania |
Dept. of Community and Economic Development certifies modular units. |
Local building departments issue permits. |
Requires compliance with Pennsylvania Uniform Construction Code. |
| Rhode Island |
State Building Commission certifies modular units. |
Local building departments issue permits. |
Requires compliance with Rhode Island Building Code. |
| South Carolina |
Manufactured Housing Board certifies modular units. |
Local building departments issue permits. |
Requires compliance with South Carolina Building Code. |
| South Dakota |
Dept. of Public Safety certifies modular units. |
Local building departments issue permits. |
Requires compliance with South Dakota Building Code. |
| Tennessee |
Dept. of Commerce and Insurance certifies modular units. |
Local building departments issue permits. |
Requires compliance with Tennessee Building Code. |
| Texas |
Industrialized Housing and Buildings Program certifies modular units. |
Local jurisdictions issue permits. |
Factory certification emphasized. |
| Utah |
Division of Facilities Construction and Management oversees modular program. |
Local jurisdictions issue permits. |
Statewide program centralized in 2024. |
| Vermont |
Dept. of Public Safety certifies modular units. |
Local building departments issue permits. |
Requires compliance with Vermont Building Code. |
| Virginia |
Dept. of Housing and Community Development certifies modular units. |
Local building departments issue permits. |
Requires compliance with Virginia Building Code. |
| Washington |
Dept. of Labor and Industries certifies modular units. |
Local building departments issue permits. |
Requires compliance with Washington Building Code. |
| West Virginia |
Manufactured Housing Construction and Safety Standards Board certifies modular units. |
Local building departments issue permits. |
Requires compliance with West Virginia Building Code. |
| Wisconsin |
Dept. of Safety and Professional Services certifies modular units. |
Local building departments issue permits. |
Requires compliance with Wisconsin Building Code. |
| Wyoming |
Dept. of Fire Prevention and Electrical Safety certifies modular units. |
Local building departments issue permits. |
Requires compliance with WyomingBuilding Code. |