Brush Clearance: Sonora vs Twain Harte
How do brush clearance rules compare between Sonora, CA and Twain Harte, CA?
Sonora and Twain Harte have similar restriction levels.
Sonora, CA
Tuolumne County
Sonora's Defensible Space Ordinance, adopted June 3, 2019, requires every property owner to maintain a 30-foot defensible space zone of cleared flammable vegetation around any building, plus a reduced fuel zone from 30 to 100 feet (or to the property line) and a 10-foot buffer along property lines that border a structure or evacuation route. The ordinance is enforced by the Sonora Fire Department at 201 S. Shepherd Street.
View full Sonora rules →Twain Harte, CA
Tuolumne County
California Public Resources Code 4291 requires 100 feet of defensible space around structures in State Responsibility Areas. Most of Twain Harte is in SRA, making Cal Fire defensible-space inspections routine and enforcement strict.
View full Twain Harte rules →Key Facts Comparison
| Fact | Sonora | Twain Harte |
|---|---|---|
| Adopted | June 3, 2019 | - |
| Inner Zone | 30 ft cleared | - |
| Reduced Fuel Zone | 30-100 ft | - |
| Property Line Buffer | 10 ft | - |
| State Backstop | PRC 4291 (100 ft SRA) | - |
| Fire Dept | 201 S. Shepherd St | - |
| Statute | - | PRC 4291 |
| Distance | - | 100 feet minimum |
| Zone 0 | - | 0-5 ft ember resistant |
| Enforcer | - | Cal Fire SRA |
Highlighted rows indicate differences between cities.
Sonora FAQ
How far around my Sonora house do I have to clear brush?
Sonora's Defensible Space Ordinance, effective in 2019, requires a 30-foot zone of cleared flammable vegetation around every building, plus a reduced fuel zone from 30 to 100 feet (or to your property line if it is closer) and a 10-foot buffer along property lines that border a structure or evacuation route. Because Tuolumne County is in CAL FIRE's State Responsibility Area, Public Resources Code Section 4291 also requires 100 feet of defensible space.
Do I have to remove all my landscaping under Sonora's brush clearance rules?
No. The ordinance specifically does not require removal of ornamental trees, shrubs, plants, or lawns of reasonable growth, and the reduced fuel zone is about spacing and pruning, not bare ground. The goal is to make it difficult for fire to jump between fuel sources. Inspections are handled by the Sonora Fire Department at 201 S. Shepherd Street.
Twain Harte FAQ
Does defensible space let me clear-cut every tree?
No. The goal is fuel reduction, not bare ground. Healthy spaced trees with limbed-up canopies and reduced ladder fuels are preferred.
Will my insurance check defensible space?
Yes. Many California insurers now require documented defensible space, and the FAIR Plan and Safer from Wildfires program reward compliance.
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