International Residential Code
IRC adoption by state
Which IRC edition each of the 49 jurisdictions enforces: the 48 contiguous states and the District of Columbia. Of the 49 values, 29 come from the state’s own records, verified or partial. The other 20 are tracker leads or have no data yet. Data as of .
Editions in force
| Edition in force | Total | Verified or partial |
|---|---|---|
| 2024 IRC | 10 | 7 |
| 2021 IRC | 16 | 10 |
| 2018 IRC | 8 | 4 |
| 2015 IRC | 5 | 3 |
| 2012 IRC | 1 | 1 |
| Local adoption | 7 | 3 |
| State’s own code | 1 | 1 |
| No data yet | 1 | 0 |
Every jurisdiction
| State | Edition in force | In force since | How it was checked |
|---|---|---|---|
| Alabama | 2015 IRC | No date on record | Lead only |
| Arizona | Local adoption | No date on record | Verified |
| Arkansas | 2021 IRC | Not researched yet | Lead only |
| California | 2024 IRC | Verified | |
| Colorado | 2024 IRC | No date on record | Partial |
| Connecticut | 2021 IRC | Verified | |
| Delaware | Local adoption | Not researched yet | Lead only |
| District of Columbia | 2015 IRC | Not researched yet | Lead only |
| Florida | 2021 IRC | Verified | |
| Georgia | 2024 IRC | Verified | |
| Idaho | 2018 IRC | Not researched yet | Lead only |
| Illinois | Local adoption | No date on record | Partial |
| Indiana | 2018 IRC | Verified | |
| Iowa | 2024 IRC | Not researched yet | Lead only |
| Kansas | Local adoption | Not researched yet | Lead only |
| Kentucky | 2015 IRC | Partial | |
| Louisiana | 2021 IRC | Verified | |
| Maine | 2021 IRC | Not researched yet | Lead only |
| Maryland | 2021 IRC | Verified | |
| Massachusetts | 2021 IRC | Verified | |
| Michigan | 2015 IRC | Verified | |
| Minnesota | 2018 IRC | Verified | |
| Mississippi | 2024 IRC | Not researched yet | Lead only |
| Missouri | Local adoption | No date on record | Partial |
| Montana | 2021 IRC | Not researched yet | Lead only |
| Nebraska | 2018 IRC | Not researched yet | Lead only |
| Nevada | Local adoption | Not researched yet | Lead only |
| New Hampshire | 2021 IRC | Not researched yet | Lead only |
| New Jersey | 2024 IRC | Verified | |
| New Mexico | 2021 IRC | Not researched yet | Lead only |
| New York | 2024 IRC | Verified | |
| North Carolina | 2015 IRC | Partial | |
| North Dakota | 2024 IRC | Not researched yet | Lead only |
| Ohio | 2018 IRC | Verified | |
| Oklahoma | 2024 IRC | Verified | |
| Oregon | 2024 IRC | Verified | |
| Pennsylvania | 2021 IRC | Verified | |
| Rhode Island | 2018 IRC | Not researched yet | Lead only |
| South Carolina | 2021 IRC | Verified | |
| South Dakota | 2021 IRC | Not researched yet | Lead only |
| Tennessee | 2018 IRC | Partial | |
| Texas | 2012 IRC | Verified | |
| Utah | 2021 IRC | Partial | |
| Vermont | No data yet | Not researched yet | No data yet |
| Virginia | 2021 IRC | Verified | |
| Washington | 2021 IRC | Verified | |
| West Virginia | 2018 IRC | Not researched yet | Lead only |
| Wisconsin | State’s own code | No date on record | Verified |
| Wyoming | Local adoption | Not researched yet | Lead only |
A row marked Lead only shows the edition a tracker lists. That is a cross-check, not the state’s own record.
How these values were checked
- Verified22 valuesTwo separate readings of the state’s own record agree, and the passage is on file word for word.
- Partial7 valuesResearched in the state’s own record. The seal stays broken until the passage is on file word for word.
- Lead only19 valuesA tracker lists this edition. Nobody has checked it against the state’s own record yet.
- No data yet1 valueNo tracker lists a value, and the state’s own records have not been researched yet.