Carbon Monoxide Information

Carbon Monoxide Alarms and Detectors

Per California Senate Bill 183, beginning July 1, 2011, all existing single family homes must have carbon monoxide alarms. All other types of residences (apartments, condominiums, etc.) will need carbon monoxide alarms beginning January 1, 2013.


The new requirements apply if ANY of the following are present within a home: 

  • Attached garage
  • Natural gas or propane furnace and/or
  • Gas or wood-burning fireplace 

For existing homes, the CO alarms may be battery powered. At a minimum, CO alarms are required: 

  • Outside of each sleeping area or bedroom and 
  • On each level of the home

New California Building Code Requirements 

Effective January 1, 2011, the California Building Code has similar requirements for all new homes and for existing homes undergoing alterations and repairs requiring building permits. Further information about specific requirements is available as follows: 

  • Carbon monoxide alarms or detectors are required on all residential building permits exceeding $1000. Exemptions apply to homes that have no fossil fuel-burning appliances, fireplace, or attached garage.
  • Carbon monoxide alarms or detectors must be installed in accordance with CRC Section R314.6.2 and R315.2 respectively.
  • For a list of CO alarms currently approved by the Office of the State Fire Marshal, visit the California Department of Forestry and Fire Protection website a at http://osfm.fire.ca.gov/licensinglistings/licenselisting_bml_searchcotest.php. Select 5276 (Carbon Monoxide Alarms) from the "Category" dropdown list and hit the "Search" button. 



Heidi Kunstal

Community Development Department Director
981 H Street, Suite 110  |  Crescent City, CA 95531
Building Inspection  |  (707) 464-7253
Code Enforcement  |  (707) 464-7254
Engineering & Surveying  |  (707) 464-7229
Environmental Health  |  (707) 465-0426
Planning  |  (707) 464-7254
Roads  |  (707) 464-7238