Smoke Detectors: Kirkland vs Seattle
How do smoke detectors rules compare between Kirkland, WA and Seattle, WA?
Kirkland has fewer restrictions than Seattle.
Kirkland, WA
King County
Kirkland requires working smoke alarms in every bedroom and on every level, plus CO alarms outside sleeping areas, under WA IRC R314-R315 and RCW 19.27.530.
View full Kirkland 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 | Kirkland | Seattle |
|---|---|---|
| Location | Every bedroom + each level | - |
| CO Alarm | Outside sleeping areas | - |
| Code | IRC R314, R315 + RCW 19.27.530 | RCW 19.27 IRC R314 |
| New Build | Hardwired with battery backup | - |
| Free Alarms | Kirkland Fire program | - |
| Every Sleep Room | - | Required |
| New Construction | - | Hardwired + interconnected |
| CO Alarms | - | Required RCW 19.27.530 |
| 10-year Battery | - | Allowed existing homes |
Highlighted rows indicate differences between cities.
Kirkland FAQ
Where must smoke alarms be installed in a Kirkland home?
In every bedroom, immediately outside sleeping areas, and on every level including basements under IRC R314.
Does my Kirkland rental need CO alarms?
Yes. All Washington rentals must have CO alarms outside sleeping areas regardless of construction date under RCW 19.27.530.
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.
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