Brush Clearance: Petaluma vs Sonoma
How do brush clearance rules compare between Petaluma, CA and Sonoma, CA?
Petaluma and Sonoma have similar restriction levels.
Petaluma, CA
Sonoma County
Sonoma County Code Chapter 13A requires owners of parcels in the unincorporated area to maintain defensible space and abate hazardous vegetation year-round. Improved parcels in the Local Responsibility Area must keep 30 feet of defensible space (up to 100 feet if conditions require), limb trees, and clear roadside vegetation. Non-compliance can be abated by the County with costs liened to the property.
View full Petaluma rules →Sonoma, CA
Sonoma County
Property owners in the City of Sonoma must maintain 100 feet of defensible space around structures per California Public Resources Code §4291 (in Very High Fire Hazard Severity Zones) and meet weed abatement standards enforced by the Sonoma Valley Fire District annually. Failure to comply can result in city-conducted abatement with the cost recovered as a property tax lien.
View full Sonoma rules →Key Facts Comparison
| Fact | Petaluma | Sonoma |
|---|---|---|
| Ordinance | Sonoma County Code Chapter 13A | - |
| Core defensible space | 30 ft around structures | - |
| Extended zone | Up to 100 ft by slope/fuel | - |
| Roadside clearance | 10 ft minimum | - |
| Tree limbing | Branches up 6 ft from ground | - |
| Non-compliance | County abatement + lien | - |
| Statute (VHFHSZ) | - | Cal. Public Resources Code §4291 |
| Zone 0 (Ember-resistant) | - | 0–5 ft from structure – noncombustible |
| Zone 1 (Lean/Clean/Green) | - | 5–30 ft – thinned vegetation, no dead fuel |
| Zone 2 (Reduced Fuel) | - | 30–100 ft – ladder-fuel removal, spacing |
| Annual abatement deadline | - | June 1 (SVFD Weed Abatement Program) |
| Non-compliance cost recovery | - | Tax lien under Gov. Code §39580–39588 |
Highlighted rows indicate differences between cities.
Petaluma FAQ
How much defensible space does Sonoma County require?
Under Sonoma County Code Section 13A-4, improved parcels in the Local Responsibility Area must maintain 30 feet of defensible space around all structures - grass cut to 6 inches, trees limbed up 6 feet - with additional clearance out to 100 feet required depending on slope, fuel load, and fuel type. This mirrors Public Resources Code section 4291 for State Responsibility Area parcels.
What happens if I don't clear my brush?
The County Fire Warden/Fire Marshal issues a notice of violation and order to abate, giving you 30 calendar days. If you don't comply, the County can abate the hazard and place unpaid costs, fees, and penalties as a lien on your property under Chapter 13A.
Sonoma FAQ
How much defensible space do I need around my Sonoma home?
If your property is in a Very High Fire Hazard Severity Zone (per the City of Sonoma's May 2025 adopted map), Public Resources Code §4291 requires 100 feet of defensible space in three zones (0–5 ft ember-resistant, 5–30 ft lean/clean/green, 30–100 ft reduced fuels). Outside VHFHSZ, the City and SVFD still require annual weed abatement to remove dead/dry vegetation by June 1.
What happens if I don't clear my brush?
The Sonoma Valley Fire District issues a Notice to Abate. You get 30 days after a first failed inspection. After a second failure and any hearing, the City can contract a crew to abate the property and charge the cost back to you as a special assessment on your property tax bill.
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