Smoke Detectors: Antioch vs El Cerrito
How do smoke detectors rules compare between Antioch, CA and El Cerrito, CA?
Antioch has fewer restrictions than El Cerrito.
Antioch, CA
Contra Costa County
Smoke alarms and carbon monoxide detectors are required in every Antioch dwelling under California Health & Safety Code 13113.7 and 13260. Alarms must be installed in every bedroom, outside sleeping areas, and on each floor. Sale or rental of a property triggers a mandatory compliance inspection.
View full Antioch 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 | Antioch | El Cerrito |
|---|---|---|
| Smoke alarm law | H&S Code 13113.7 | - |
| CO detector law | H&S Code 13260 | - |
| Battery type | 10-year sealed (since 2015) | - |
| Required locations | Each bedroom, hallway, every floor | - |
| Landlord duty | Install at turnover; tenant maintains | Test and maintain each new tenancy |
| 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 |
| Sale disclosure | - | Required on TDS (Civil Code 1102.6) |
Highlighted rows indicate differences between cities.
Antioch FAQ
Do I need CO detectors if I have an all-electric home?
Only if you have an attached garage. Fully electric homes without attached garages or fuel-burning appliances are exempt from the CO detector requirement.
Who is responsible in a rental - landlord or tenant?
The landlord must install and certify functional alarms at tenant move-in. Tenants must test monthly and replace batteries during their tenancy; landlords handle replacements of the sealed units.
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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