Smoke Detectors: Federal Way vs Seattle
How do smoke detectors rules compare between Federal Way, WA and Seattle, WA?
Federal Way and Seattle have similar restriction levels.
Federal Way, WA
King County
Federal Way enforces WAC 51-51-0314 via FWRC 13.22. Smoke alarms required in every bedroom, outside sleeping areas, and on every floor. CO detectors required per RCW 19.27.530 in all dwellings.
View full Federal Way rules →Seattle, WA
King County
Smoke alarms required in all King County dwellings per WA Building Code (RCW 19.27, IRC R314). New construction needs hardwired interconnected alarms with battery backup; battery-only allowed in existing homes.
View full Seattle rules →Key Facts Comparison
| Fact | Federal Way | Seattle |
|---|---|---|
| Smoke Code | WAC 51-51-0314 | - |
| CO Code | RCW 19.27.530 | - |
| Location | Every bedroom and floor | - |
| Battery Rule | 10-yr sealed (RCW 43.44.110) | - |
| Local Adoption | FWRC 13.22 | - |
| Every Sleep Room | - | Required |
| New Construction | - | Hardwired + interconnected |
| CO Alarms | - | Required RCW 19.27.530 |
| 10-year Battery | - | Allowed existing homes |
| Code | - | RCW 19.27 IRC R314 |
Highlighted rows indicate differences between cities.
Federal Way FAQ
Where do I need smoke alarms in a Federal Way home?
Inside every bedroom, outside each sleeping area, and on every story including basements. This is required statewide under WAC 51-51-0314.
Do I need carbon monoxide detectors too?
Yes. RCW 19.27.530 requires CO detectors in all dwellings with fuel-burning appliances or attached garages. Install outside sleeping areas and on every story.
Who is responsible for alarms in rentals, landlord or tenant?
Landlords must install and ensure alarms work at move-in. Tenants must maintain them, replace batteries, and notify the landlord of failures under RCW 59.18.
Seattle FAQ
Can I use battery-only smoke alarms in my older home?
Yes, battery-only alarms are legal in existing homes not undergoing permitted remodel. 10-year sealed-battery units are recommended and meet the state standard.
Do I need a carbon monoxide alarm?
Yes if your home has any fuel-burning appliance (gas furnace, gas stove, gas water heater, gas fireplace, or wood stove) or an attached garage. Required statewide since 2013.
Compare other topics
See how Federal Way and Seattle compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool