| Agency | Approval(s) |
|---|---|
| US Department of Housing and Urban Development (HUD) | Design Approval Primary Inspection Agency (DAPIA) In-plant Primary Inspection Agency (IPIA) |
| US Department of Agriculture | Farmer's Home Administration (FmHA) Recognized Code Authority |
| American Association for Laboratory Accreditation (A2LA) | American Association for Laboratory Accreditation (A2LA) Inspection ISO/IEC 17020 Certification ISO/IEC 17065 Testing ISO/IEC 17025 |
| Standards Council of Canada | Standards Council of Canada Certification Body |
| State/Locality | Modular Program | Approval(s) |
|---|---|---|
| Alabama | Yes | State Plan Review & Third Party Inspection |
| Arizona | Yes | State Plan Review & Third Party Inspection |
| California | Yes | Third Party Plan Review & Inspection |
| Colorado | Yes | Third Party Plan Review & Inspection |
| Connecticut | Yes | State Plan Review & Third Party Inspection |
| Florida | Yes | State Plan Review & Third Party Inspection |
| Georgia | Yes | State Plan Review & Third Party Inspection |
| Idaho | Yes | State Plan Review & Third Party Inspection |
| Illinois | Yes | Third Party Plan Review & Inspection |
| Indiana | Yes | State Plan Review & Third Party Inspection |
| Iowa | Yes | Third Party Plan Review & Inspection |
| Kentucky | Yes | State Plan Review & Third Party Inspection State performs plumbing inspections |
| Louisiana | Yes | Third Party Plan Review & Third Party Inspection – Residential State Fire Marshall Plan Review & Third Party Inspection – Commercial |
| Maine | Yes - R only | Third Party Plan Review & Inspection - Residential Only |
| Maryland | Yes | Third Party Plan Review & Inspection. State issues an approval letter after review of Third Party approved documents |
| Massachusetts | Yes | Third Party Plan Review & Inspection. State issues an approval letter after review of Third Party approved documents |
| Michigan | Yes | State Plan Review & Third Party Inspection |
| Minnesota | Yes | Third Party Plan Review & Inspection |
| Mississippi | Yes - R only | Third Party Plan Review & Inspection - Residential Only |
| Missouri | Yes | Third Party Plan Review & Inspection |
| Montana | Yes | State Plan Review & Third Party Inspection |
| Nebraska | Yes - R only | Third Party Plan Review & Inspection - Residential Only |
| Nevada | Yes | Third Party Plan Review & Inspection |
| New Hampshire | Yes | Third Party Plan Review & Inspection |
| New Jersey | Yes | Third Party Plan Review & Inspection |
| New Mexico | Yes | State Plan Review & Third Party Inspection |
| New York | Yes | State / 3rd Party for qualified RES MFG's |
| North Carolina | Yes | Third Party Plan Review & Inspection |
| North Dakota | Yes | Third Party Plan Review & Inspection |
| Ohio | Yes | State Plan Review & Third Party Inspection |
| Oregon | Yes | State Plan Review & State Inspection |
| Pennsylvania | Yes | Third Party Plan Review & Inspection |
| Rhode Island | Yes | Third Party Plan Review & Inspection |
| South Carolina | Yes | State Plan Review & Third Party Inspection. State issues an approval letter after review of Third Party approved documents |
| Tennessee | Yes | State Plan Review & Third Party Inspection. State issues an approval letter after review of Third Party approved documents |
| Texas | Yes | Third Party Plan Review & Inspection |
| Virginia | Yes | State Plan Review & Third Party Inspection |
| Washington | Yes | Third Party Plan Review & State Inspection |
| Wisconsin | Yes - R only | Third Party Plan Review & Inspection |