Santee, CA Environmental Rules: Defensible Space (2026)

Section 603.5.1 of Santee's WUI Code amendments sets the baseline: any new development, subdivision or tract must keep a minimum of 100 horizontal feet of fuel-modified defensible space between its structures and adjacent wildland, and the code official can push that distance beyond 100 feet where slope or vegetation raise the fire hazard. Section 603.5.2 extends the duty to any building designed for human habitation or to house farm animals, though small accessory structures under 250 square feet that sit at least 50 feet from a dwelling, and fences more than five feet from a dwelling, don't count as structures that trigger a zone.

Where a building already sits 100 feet or more from the property line, the owner must maintain the 100-foot fuel modification zone entirely within that setback; where the building is closer than 100 feet to the line, the owner must fuel-modify as much of the intervening area as possible, and the code official can require an adjoining owner to extend the zone onto the neighboring parcel if that is what it takes to reach full defensible space. Owners may clear combustible vegetation within the full 100-foot radius by mowing, trimming or discing so long as root structure that stabilizes the soil stays intact, and for new subdivisions the code official can require a developer to hand off zone maintenance to a homeowners' association before the property is occupied.