• Smoke Alarm Requirements

  • Acceptable locations for a smoke alarm within dwelling units are outlined in the 2007 California Building Code and described as follows:

    In dwelling units, a smoke alarm shall be installed in each sleeping room and at a point centrally located in the corridor or area giving access to each separate sleeping area.

    When the dwelling unit has more than one story and in dwellings with basements, a smoke alarm shall be installed on each story and in the basement. In dwelling units where a story or basement is split into two or more levels, the smoke alarm shall be installed on the upper level, except that when the lower level contains a sleeping area, a smoke alarm shall be installed on each level. When sleeping rooms are on an upper level, the smoke alarms shall be placed at the ceiling of the upper level in close proximity to the stairway.

    In dwelling units where the ceiling height of a room open to the hallway serving the bedrooms exceeds that of the hallway by 24 inches (610 mm) or more, smoke alarms shall be installed in the hallway and in the adjacent room.

    Smoke alarms shall sound an alarm audible in all sleeping areas of the dwelling unit in which they are located.

    Note: Smoke Alarms must be labeled by UL Laboratories and the State Fire Marshal.

    Existing permanently wired smoke alarms must be replaced in kind. They are not permitted to be replaced with battery powered units.


    Location Diagrams:

    The locations indicated on the typical floor plans are only a general guide. Ceiling height changes, vaulted ceilings, existing fixtures, etc. can effect the proper location of smoke alarms.


    Contact the Building Division at (925) 314-3330 with any questions you may have.