What building code does Washington use?
Washington currently enforces Washington Building Code, 2021 edition (statewide 2021 code cycle). Cities and counties in Washington may adopt local amendments.
Adopted codes — 2021 cycle
| Scope | Code | Edition |
|---|---|---|
| Building | Washington Building Code | 2021 |
| Residential | Washington Residential Code | 2021 |
| Fire | Washington Fire Code | 2021 |
| Mechanical | Washington Mechanical Code | 2021 |
| Energy | Washington State Energy Code — Residential | 2021 |
| Existing Building | Washington Existing Building Code | 2021 |
| Fuel Gas | Washington Fuel Gas Code | 2021 |
| Wildland-Urban Interface | Washington Wildland-Urban Interface Code | 2021 |
Get this data as JSON
curl https://codes.submittal.app/api/v1/states/washington.jsonEvery page on this site is backed by the open building-codes dataset (CC BY 4.0). Source: ICC code-adoption records, retrieved 2026-04-28.