Smoke Detectors: Renton vs Seattle
How do smoke detectors rules compare between Renton, WA and Seattle, WA?
Renton and Seattle have similar restriction levels.
Renton, WA
King County
Renton requires smoke alarms in every sleeping area and on each floor under the WA Residential Code (RCW 19.27) and IFC via RMC 4-5-070. Rentals need working alarms at each tenancy per RCW 48.48.140.
View full Renton 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 | Renton | Seattle |
|---|---|---|
| Code | WA Residential Code, IFC 907 via RMC 4-5-070 | RCW 19.27 IRC R314 |
| Locations | Each bedroom, outside sleeping areas, each floor | - |
| New Construction | Interconnected hardwired with backup | Hardwired + interconnected |
| CO Alarms | Required with fuel appliances or garage | Required RCW 19.27.530 |
| Rentals | Working alarms at each tenancy, RCW 48.48.140 | - |
| Every Sleep Room | - | Required |
| 10-year Battery | - | Allowed existing homes |
Highlighted rows indicate differences between cities.
Renton FAQ
Do I need interconnected smoke alarms in my older Renton home?
Not until you do a permitted renovation over 1,000 dollars or add a bedroom. Otherwise battery-operated sealed 10-year alarms meet the minimum.
Are carbon monoxide detectors required?
Yes, in any dwelling with fuel-fired appliances like gas furnaces or a garage attached to living space, per 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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