Dublin, CA Fire Regulations: Smoke Detectors (2026)

Dublin Municipal Code Sec. 080 amends the adopted 2022 California Residential Code (incorporated by reference under Sec. 030) to require that whenever alterations, repairs, or additions requiring a permit add or create one or more sleeping rooms in an existing Group R, Division 3 occupancy (one- and two-family dwellings and townhouses), the entire building must be fitted with smoke alarms and carbon monoxide alarms located as required for new construction, not just the room being added. The identical retrofit trigger applies to other Group R occupancies, such as apartments and hotels, under the parallel Building Code amendment at Sec.

090. The same section also requires spark arrestors on all chimneys connected to solid fuel-burning appliances whenever this retrofit trigger applies. The baseline smoke and carbon monoxide alarm placement standards for new construction come from the state Residential Code sections adopted by reference in Sec. 030, not from a locally invented standard; Dublin's own addition is the requirement that a retrofit extend alarm coverage to the whole building, not merely the altered portion, whenever a sleeping room is added.