San Diego, CA Fire Regulations: Smoke Detectors (2026)
Key Facts
- Authority
- SDMC Chapter 14 Article 5; 2022 CRC R314
- State Law
- Cal. Health & Safety Code §§13113.7, 13114
- Locations Required
- Each sleeping room; outside each sleeping area; every story
- Power (New Construction)
- Hard-wired with battery backup, interconnected
- Power (Existing - Battery)
- 10-year sealed lithium (HSC 13114)
- Standard
- Listed to UL 217; installed per NFPA 72
- Retrofit Trigger
- Alterations/additions over $1,000 (CRC R314.2.2)
- Replace Every
- 10 years
Summary
San Diego enforces 2022 California Residential Code Section R314 and California Health and Safety Code Sections 13113.7 and 13114 through the San Diego Building Regulations (SDMC Chapter 14, Article 5). Smoke alarms are required in each sleeping room, outside each sleeping area, and on every story including basements, with hard-wiring and interconnection in new construction.
Install a smoke detector on each level of your home. The detector should be centrally located between the bedrooms. Place smoke detectors in each bedroom. If you, or someone in your home is deaf or hard of hearing, consider installing an alarm that combines flashing lights, vibration and/or sound. Mount smoke alarms high on walls or ceilings (remember, smoke rises). Ceiling mounted alarms should be installed at least four inches away from the nearest wall; wall-mounted alarms should be installed four to 12 inches away from the ceiling. If you have ceilings that are pitched, install the alarm near the ceiling's highest point. Don't install smoke alarms near windows, doors, or ducts where drafts might interfere with their operation. [...] Smoke alarms don't last forever. Replace your smoke alarms every ten years. California law requires that the new alarm you buy will have a ten-year, sealed battery.
Full Breakdown
The City of San Diego adopts the 2022 California Residential Code (including Section R314) and California Building Code through SDMC Chapter 14, Article 5. CRC R314 requires smoke alarms in each sleeping room, outside each separate sleeping area within 21 feet of any bedroom door, and on each additional story including basements and habitable attics. New construction and additions require hard-wired alarms with battery backup, interconnected so activation of one triggers all. California Health and Safety Code Sections 13113.7 and 13114 require smoke alarms in all existing dwelling units; alarms sold in California since July 1, 2014 must contain a non-removable 10-year sealed lithium battery (HSC 13114). Permits for alterations or additions exceeding $1,000 trigger retroactive smoke alarm compliance. Alarms must be listed and labeled to UL 217 and installed per NFPA 72. The San Diego Fire-Rescue Department recommends replacement every 10 years.
Violations & Fines
Missing, disabled, or non-compliant smoke alarms violate CRC R314 and California Health and Safety Code Section 13113.7 and can result in failed inspections, stop-work orders, and code-enforcement citations. Landlords face civil penalties under California HSC for failure to install or maintain alarms in rental units.
Frequently Asked Questions
Where must smoke alarms be installed in a San Diego home?
Do existing San Diego homes need hard-wired smoke alarms?
When do I have to upgrade smoke alarms during a remodel?
Sources & Official References
Other rules in San Diego
California rules heatmap·Compare San Diego to another location·View the California fire regulations overview
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Smoke Detectors in Nearby Cities
How other cities in San Diego County handle smoke detectors.