Smoke Detectors: Brentwood vs El Cerrito
How do smoke detectors rules compare between Brentwood, CA and El Cerrito, CA?
Brentwood and El Cerrito have similar restriction levels.
Brentwood, CA
Contra Costa County
California Health & Safety Code Section 13113.7 and Title 24 require working smoke alarms in every bedroom, outside sleeping areas, and on each floor of all Brentwood dwellings. Units built or substantially remodeled since 2015 must have 10-year sealed lithium battery or hardwired interconnected alarms. Carbon monoxide alarms are also mandatory under SB 183.
View full Brentwood rules →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 →Key Facts Comparison
| Fact | Brentwood | El Cerrito |
|---|---|---|
| - | - | |
| 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) |
Highlighted rows indicate differences between cities.
Brentwood FAQ
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.
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