Washington's adopted International Residential Code under RCW 19.27 makes fire sprinklers mandatory in townhouses and multifamily buildings; single-family fire sprinklers are typically required only when triggered by access, water-supply, or local amendments.
King County follows the Washington State Building Code (RCW 19.27), which adopts the International Residential Code (IRC) and International Building Code (IBC) statewide. Fire sprinklers (NFPA 13D) are required in new townhouses and multifamily structures. For single-family detached homes, sprinklers are not universally required at the state level, but local fire-code amendments, long driveways, or insufficient hydrant flow can trigger them in unincorporated King County and many of the county's 39 cities. Plan review is handled by King County Department of Local Services Permitting in unincorporated areas and by city building departments elsewhere, with fire-district sign-off.
Building or remodeling without required sprinklers, or bypassing sprinkler heads, is a building- and fire-code violation under IRC, IBC, and RCW 19.27, with stop-work orders and corrections required.
Auburn, WA
Auburn applies WAC 173-60 EDNA limits through ACC 8.28. Residential: 55 dBA day, 45 dBA night. Industrial receiving: 60 dBA day, 50 dBA night. Measured at th...
Auburn, WA
Industrial sources into residential zones are capped at 60 dBA day and 50 dBA night under WAC 173-60 via ACC 8.28. The Boeing Auburn plant and Valley warehou...
Auburn, WA
Federal law preempts local aircraft noise. Auburn Municipal Airport follows FAA Part 150 and Sea-Tac overflights are under FAA and Port of Seattle. ACC 8.28 ...
Auburn, WA
Outdoor concerts and festivals must meet ACC 8.28 limits and often need a special event permit. Downtown Auburn and Les Gove Park events follow a written noi...
Auburn, WA
Auburn restricts RV, trailer, and boat parking on public streets to 72 hours and sets additional limits on driveway and front-yard storage of recreational ve...
Auburn, WA
EV charging in Auburn follows the Washington State Energy Code, which requires EV-ready capacity in new multifamily and commercial parking and protects publi...
Side-by-side rule comparisons with other cities in King County.
See how Auburn's fire sprinkler requirements rules stack up against other locations.
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