California Rental Smoke and Carbon Monoxide Detector Rules
By JC Pacific Corp Published 2026-09-01 Last professionally reviewed: September 2026
California rental owners must provide required smoke and carbon monoxide alarms in applicable locations and maintain them as required by law. Tenants also have duties involving notification and lawful maintenance.
What should landlords do?
Before and during tenancy:
- Install approved devices in required locations
- Follow current building and fire codes
- Test devices before move-in
- Replace expired devices
- Document installation and testing
- Respond promptly to tenant reports
- Follow battery and power-source rules
- Recheck during lawful inspections
- Avoid disabling or removing devices during renovation
What should tenants do?
Tenants should:
- Report nonworking devices
- Avoid disabling alarms
- Replace batteries when lawfully assigned
- Permit lawful access for repair
- Report damage or missing devices
The landlord retains statutory responsibilities that cannot simply be waived.
Where are devices required?
Requirements depend on building type, number of stories, sleeping areas, fuel-burning appliances, attached garages, construction date, and code. Use the current state and local requirements for the specific property.
Frequently Asked Questions
Can a landlord rely on a move-in checklist alone?
No. Documentation helps, but devices must remain compliant.
Are sealed ten-year alarms required?
Requirements depend on device type, location, replacement, and applicable code.
Does an all-electric home need carbon monoxide alarms?
The answer depends on statutory triggers and building conditions. Verify locally.
Educational information
This content is for general educational purposes and is not legal, tax, financial, investment, insurance, fair-housing, or property-management advice. California landlord-tenant law is highly fact-specific and changes frequently. Cities and counties may impose additional rent-control, eviction, relocation, registration, tenant-buyout, inspection, and notice requirements. Consult a qualified California attorney or other appropriately licensed professional regarding a specific property, tenant, notice, screening decision, accommodation request, or dispute. Housing providers must comply with federal, California, and applicable local fair-housing laws. Screening standards and rental practices must not discriminate based on race, color, religion, sex, gender, gender identity, gender expression, sexual orientation, marital status, national origin, ancestry, familial status, disability, source of income, veteran or military status, citizenship, immigration status, primary language, age, or any other protected characteristic.
Add alarm testing and expiration dates to the property's maintenance calendar.
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A note on legal advice: These guides provide general, educational information about California real estate practice. They are not legal advice and do not create an attorney-client relationship. Mortgage information is general education, not individualized lending, tax or legal guidance. For advice about your specific offer, contract, closing or financing, consult a qualified California real estate attorney and a qualified mortgage professional.