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10 Best Wildfire & Defensible Space Contractors in Sonoma County (2026)

Updated: 2026-07-05

Sonoma County's 2025 CAL FIRE maps pushed unincorporated Very High zone acreage from 11 to 7,555 acres. Permit Sonoma's Fire Prevention Division runs 4,000+ defensible space inspections a year and enforces the county's own vegetation ordinance. Contractors below are ranked by verified rating and review count.

Top 10 contractors in Sonoma County

Fire hazard zones after the 2025 remap

Sonoma County’s fire hazard picture changed substantially when CAL FIRE released updated Local Responsibility Area maps in early 2025. Unincorporated county land went from 11 acres of Very High severity zone to 7,555 acres, and gained 9,149 acres of newly mapped High-hazard zone that didn’t exist under the older maps. Santa Rosa’s pattern was different: its Very High zone shrank from 1,644 to 475 acres, but the city picked up 3,081 acres of new High-hazard designation, much of it in and around neighborhoods rebuilt after the 2017 Tubbs Fire and areas affected by the 2020 Glass Fire. If you haven’t checked your parcel since before 2025, your zone may have changed even if your street looks the same. See Permit Sonoma’s FHSZ maps and lookup tool.

Local rules and inspection deadlines

Sonoma County enforces its own vegetation management ordinance (County Code Chapter 13A / Ordinance 6148) on top of state law, requiring defensible space to 100 feet from structures and 10 feet from roads and driveways. Permit Sonoma’s Fire Prevention Division, working with local fire districts, runs upward of 4,000 defensible space inspections a year in the highest-risk areas, generally starting in late spring. Zone 1 (0-30 feet from a structure) requires clearing dead vegetation, pruning tree limbs to 6 feet off the ground, and keeping roofs and gutters free of needles and leaves; Zone 2 (30-100 feet) has lighter but still mandatory fuel-reduction rules that scale with slope and vegetation type. A failed inspection starts a 30-day clock to fix problems before re-inspection, with further deadlines and cost-recovery fees if the property still isn’t compliant after that.

Free chipping and grant programs

The county’s Residential Curbside Chipper Program gives unincorporated-area homeowners up to two hours of free chipping for defensible-space debris — enough for a pile roughly 50 feet long, 3 feet high, and 8 feet wide. Reserve a slot at chipperday.com after confirming your brush pile meets the size and material rules (freshly cut limbs, 1-4 inches thick, no construction wood or root balls). In West County, Fire Safe Sonoma runs a separate CAL FIRE grant-funded chipper program covering Camp Meeker, Forestville, Occidental, and Monte Rio.

County resources

Fire Safe Sonoma is the county’s Firewise-affiliated nonprofit, publishing “Ready, Set, Go!” evacuation and preparedness guidance and managing grant-funded mitigation projects across the county. For official zone lookups, inspection schedules, and the full ordinance text, use Permit Sonoma’s Fire Prevention and Hazardous Materials Division as the primary source.

Frequently asked questions

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