5 county-level rules, plus city-specific rules for 3 cities in Orange County, California.
Verified from official government sources
Pre-1978 homes in unincorporated Orange County must comply with federal lead disclosure for sales and rentals, and renovations disturbing painted surfaces require EPA-certified RRP contractors under California Department of Public Health oversight.
U.S. EPA — Lead Renovation, Repair and Painting (RRP) Rule (40 CFR Part 745)
Background In 1978, the federal government banned the sale of lead-based paint for use in homes, childcare facilities and preschools. Approximately three-quarters of the homes in the United States built before 1978 still contain some lead-based paint. Children can live safely in these homes as long as paint and surfaces are in good condition and surfaces are kept clean. The key is to keep child...
Orange County rental and owner-occupied housing must remain free of vermin under California habitability law, with pest control work performed by Structural Pest Control Board licensed operators and tenting requiring OCFA notification.
Orange County and OCFA require automatic fire sprinkler systems in all new one and two-family dwellings under California Residential Code Section R313, with additional triggers for substantial remodels and homes in wildfire areas.
Orange County zoning controls oversized homes on small lots through floor area ratio limits, height caps, and second-story setback rules in residential zones, particularly within unincorporated foothill and coastal communities.
Orange County enforces the California Green Building Standards Code (CALGreen) for all new construction and major remodels, requiring water efficiency, construction waste diversion, and indoor air quality measures verified at permit close-out.
3 cities in Orange County have their own building safety rules. Each link goes to that city's dedicated page with code citations.
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Orange County Ordinance Hub →