Yorba Linda, CA Building Safety: Fire Sprinkler Requirements (2026)

Yorba Linda Municipal Code Section 15.04.050 amends Section 903.2.8, Group R, of the adopted California Building Code to state that an automatic sprinkler system installed in accordance with Section 903.3 shall be provided throughout all new buildings with a Group R fire area, with no exception for size. For existing Group R-3 buildings, an automatic sprinkler system becomes mandatory when alterations within any two-year period exceed 50 percent of the gross floor area and the building's gross floor area exceeds 4,800 square feet, when any addition is made to a building that already has a sprinkler system installed, or when the Building Code Official determines a substantial renovation is complex enough to warrant treatment as new construction; an addition under 200 square feet is excepted from the 50-percent-alteration trigger.

Separately, Section 903.2 requires sprinklers in any occupancy, new or existing, where total building area exceeds 5,000 square feet or the building is more than two stories, and requires retrofitting an existing building on addition if the addition is 33 percent or more of existing area and the resulting area exceeds 5,000 square feet, if the addition exceeds 2,000 square feet and resulting area exceeds 5,000 square feet, or if a story is added above the second floor. The corresponding residential-code mirror provision in Section 15.05.040 amends Section R317.5.1 so that an addition or alteration to an existing garage or carport without an existing sprinkler system does not itself trigger a new sprinkler requirement, unless the California Fire Code independently requires one.