Smoke Detectors: Oxnard vs Simi Valley
How do smoke detectors rules compare between Oxnard, CA and Simi Valley, CA?
Simi Valley has fewer restrictions than Oxnard.
Oxnard, CA
Ventura County
Oxnard enforces CRC Sec. R314 (smoke alarms) and R315 (carbon monoxide alarms) as adopted in the Oxnard Building Code. Alarms are required in every sleeping room, outside each sleeping area, and on each story. Alterations valued over $1,000 trigger full compliance. State Health & Safety Code Sec. 13113.7 also applies.
View full Oxnard rules →Simi Valley, CA
Ventura County
In unincorporated Ventura County, smoke and carbon monoxide alarms are required under the Ventura County Building Code, which adopts California Residential Code §R314 and §R315. When work on a dwelling exceeds $1,000 in value, alarms must be brought up to code in each bedroom, outside sleeping areas, and on every level. CO alarms apply where fuel-burning appliances or attached garages exist.
View full Simi Valley rules →Key Facts Comparison
| Fact | Oxnard | Simi Valley |
|---|---|---|
| Code Authority | Oxnard Building Code adopting CRC R314/R315 | - |
| State Statute | Cal. H&S Code Sec. 13113.7 | - |
| Required Locations | Each bedroom, outside sleeping areas, every story | - |
| CO Alarm Trigger | Fuel appliance, fireplace, or attached garage | - |
| Clearance | >= 36 in. from registers, fans, tub/shower baths | - |
| Power | Hardwired + battery backup (new/altered work) | - |
| Battery-Only OK | Existing units when no wall/ceiling removed | - |
| Compliance Trigger | Alterations valued > $1,000 | - |
| Sale Penalty | Up to $200 (H&S Sec. 13113.8) | - |
| Confirm | Oxnard Building Division (805) 385-7925 | - |
| Governing code | - | Ventura County Building Code — CRC R314 & R315 |
| Trigger for upgrade | - | Work valued over $1,000 |
| Smoke alarm locations | - | Each bedroom, outside sleeping areas, each level |
| CO alarms | - | Required where fuel-burning appliances/attached garage exist |
| Battery-only allowed | - | Yes — in specified existing-dwelling situations |
| State backstop | - | HSC §13113.7 (smoke), §17926 (CO) |
Highlighted rows indicate differences between cities.
Oxnard FAQ
Where must smoke alarms be placed in my Oxnard home?
Inside every bedroom, immediately outside each sleeping area, and on every story including basements - per CRC Sec. R314 as adopted by Oxnard.
Do I need a carbon monoxide alarm?
Yes if your home has any gas appliance, fireplace, or attached garage. CO alarms go outside each sleeping area and on every level. They are not required if the home has none of those features.
Do I need to upgrade alarms for a small remodel?
If the permit valuation exceeds $1,000, Oxnard requires the entire dwelling to comply with current R314/R315. New work also requires hardwired, interconnected alarms with battery backup.
Simi Valley FAQ
When do I have to add smoke/CO alarms in unincorporated Ventura County?
When the valuation of additions, alterations, or repairs to your dwelling exceeds $1,000, the Ventura County Building Code (CRC R314/R315) requires you to bring smoke and/or CO alarms up to code at the required locations.
Where must smoke alarms be installed?
Outside each separate sleeping area in the immediate vicinity of the bedrooms, in each bedroom, and on every level of the dwelling, per the adopted California Residential Code.
Do I need carbon monoxide alarms?
CO alarms are required in dwellings that contain fuel-burning appliances or an attached garage; they are not required in dwellings with no fuel-burning appliances.
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