Smoke Detectors: El Cerrito vs Oakley
How do smoke detectors rules compare between El Cerrito, CA and Oakley, CA?
Oakley has fewer restrictions than El Cerrito.
El Cerrito, CA
Contra Costa County
Every dwelling in unincorporated Contra Costa must have working smoke alarms in each bedroom, outside every sleeping area, and on every floor per California Health and Safety Code 13113.7 and CRC R314. Alarms installed after 2015 must be 10-year sealed-battery or hardwired with battery backup, and carbon monoxide alarms are also required.
View full El Cerrito rules →Oakley, CA
Contra Costa County
California State Fire Marshal regulations require working smoke alarms in every bedroom, outside each sleeping area, and on every floor of all dwellings. Alarms installed after 2015 must be 10-year sealed-battery models. Oakley enforces installation at point of sale and during permitted remodels. Carbon monoxide alarms are required in any home with fuel-burning appliances or attached garages under Health & Safety Code Section 13261.
View full Oakley rules →Key Facts Comparison
| Fact | El Cerrito | Oakley |
|---|---|---|
| Locations required | Each bedroom, outside each sleeping area, every floor | - |
| Battery rule | 10-year sealed battery or hardwired with backup | - |
| CO alarms | Required if fuel appliance, fireplace, or attached garage | - |
| Landlord duty | Test and maintain each new tenancy | - |
| Sale disclosure | Required on TDS (Civil Code 1102.6) | - |
| Fact | - | Required in every bedroom, outside sleeping areas, each floor |
Highlighted rows indicate differences between cities.
El Cerrito FAQ
Can I still use 9-volt battery alarms?
Existing 9-volt alarms installed before July 1, 2015 may remain in service until replacement, but any new or replacement alarm must be 10-year sealed battery or hardwired.
Are carbon monoxide alarms required in all-electric homes?
CO alarms are not required in dwellings with no fuel-burning appliances, no fireplace, and no attached garage.
Oakley FAQ
Do I need to upgrade my older smoke alarms?
If your alarms were installed before 2015 and use replaceable batteries, they still must be functional but may be replaced with 10-year sealed-battery models at next replacement. All alarms should be replaced every 10 years regardless.
Are carbon monoxide alarms really required in all homes?
Yes, if your home has any fuel-burning appliance (gas furnace, water heater, stove, fireplace) or an attached garage. Only all-electric homes without attached garages are exempt.
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