Washington Building code adoption
Statewide mandatory minimum · 5 cities tracked · 1 with amendments.
Overview
Governance
Statewide
Cities tracked
5
The state sets a single mandatory edition for every jurisdiction. Cities may only adopt more restrictive amendments, never less.
Adopted building codes (state level)
Statewide mandatory minimum. Click a code to open its full adoption atlas across all 50 states.
City-level adoption
| City | IBC edition | Amendments | Note |
|---|---|---|---|
| Bellevue | 2021 | — | — |
| Kent | 2021 | — | — |
| Marysville | 2021 | — | — |
| Seattle | 2021 | yes | — |
| Tacoma | 2021 | — | — |
Quirks & watch-items
Quirks & watch-items
- Seattle adopted 2021 codes effective Nov 15, 2024 — significant local amendments
- 2024 Seattle Codes not expected until May 2027 per SDCI
- WA uses UPC not IPC
- WA codes adopted in 2 groups; effective March 15, 2024 after two delays