California Building Code Section 313 requires automatic fire sprinklers in new one and two-family dwellings, enforced in Riverside County under Ordinance 526 with additional wildland-urban interface standards.
Since 2011, California Residential Code Section R313 has required NFPA 13D-compliant automatic fire sprinklers in newly constructed one and two-family dwellings and townhomes. Riverside County Ordinance 526 adopts this requirement and adds local amendments for wildland-urban interface (WUI) construction. Substantial remodels exceeding 50 percent of the existing structure typically trigger retrofit. Plans must be submitted to the Building and Safety Division and Riverside County Fire for review. Hydraulic calculations, freeze protection, and water-supply verification are required. Tenant improvements in commercial uses follow California Building Code Chapter 9 sprinkler thresholds.
Building without required sprinklers stops final inspection and certificate of occupancy. Removed or disabled systems can trigger fines and re-permit fees, and may void homeowner insurance.
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Side-by-side rule comparisons with other cities in Riverside County.
See how Palm Springs's fire sprinkler requirements rules stack up against other locations.
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