Smoke Detectors: Kent vs Seattle
How do smoke detectors rules compare between Kent, WA and Seattle, WA?
Kent and Seattle have similar restriction levels.
Kent, WA
King County
Kent requires working smoke alarms in every bedroom, outside sleeping areas, and on every level. Landlords must install and maintain alarms in rentals under RCW 43.44.110.
View full Kent 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 | Kent | Seattle |
|---|---|---|
| Required locations | Each bedroom, hallway, every level | - |
| New construction | Hardwired interconnected with battery backup | - |
| Landlord duty | RCW 43.44.110 install and maintain | - |
| CO alarms | Required with fuel appliances or attached garage | - |
| Free alarms | PSRFA program for eligible residents | - |
| 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.
Kent FAQ
How old can my smoke alarm be?
Replace smoke alarms every 10 years from the manufacture date printed inside. Older detectors miss real fires and generate false alarms.
Can I disable an alarm that keeps chirping?
No. Replace the battery or the unit. Disabling alarms violates fire code and voids landlord or insurance protections.
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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