Smoke Detectors: Castro Valley vs Hayward
How do smoke detectors rules compare between Castro Valley, CA and Hayward, CA?
Castro Valley and Hayward have similar restriction levels.
Castro Valley, CA
Alameda County
California Health and Safety Code 13113.7 requires smoke alarms in every bedroom, outside each sleeping area, and on every level of all dwellings in Alameda County. Alarms over 10 years old must be replaced, and new installations must be 10-year sealed lithium battery units or hardwired with battery backup.
View full Castro Valley rules →Hayward, CA
Alameda County
Hayward requires working smoke alarms in every bedroom, hallway, and level per California Building Code and Health and Safety Code 13113.7.
View full Hayward rules →Key Facts Comparison
| Fact | Castro Valley | Hayward |
|---|---|---|
| Governing law | H&S Code 13113.7 | - |
| Required locations | Each bedroom, hall, floor | Bedrooms, halls, each level |
| Max alarm age | 10 years | - |
| New alarms | 10-yr sealed lithium | - |
| CO alarms | Required per SB 183 | Required with gas or garage |
| Battery type | - | 10-yr sealed lithium |
| Replacement | - | Every 10 years |
| Rental inspections | - | Verified at turnover |
Highlighted rows indicate differences between cities.
Castro Valley FAQ
Do I need to replace smoke alarms when selling my home?
Yes. State law requires compliance at point of sale, including current model alarms in all required locations certified by the seller.
Who is responsible for batteries in a rental?
Landlord tests and ensures operability at move-in. Tenants must maintain batteries and notify landlord of malfunctions in writing.
Hayward FAQ
Are battery-only alarms still legal?
Yes in existing homes, but replacements must be 10-year sealed lithium units. New construction requires hardwired interconnected alarms.
Who is responsible in a rental?
Landlords must install and test at turnover; tenants must notify the landlord of any failure.
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