9 rules for unincorporated Mendocino County, California.
Verified from official government sources
Unincorporated Mendocino County has no fixed grass-height number in its code. Chapter 8.77 declares flammable weeds, dry grass and brush that create a fire hazard a public nuisance. Because all unincorporated land is a State Responsibility Area, CAL FIRE's defensible-space rule (annual grass cut to about 4 inches) effectively controls.
Mendocino County's code has no general permit requirement for routine pruning or trimming of trees on private inland property. For wildfire safety, CAL FIRE's defensible-space rules (limbing trees up and separating canopies) apply countywide. In the Coastal Zone, larger trimming that becomes 'major vegetation' removal can trigger a Coastal Development Permit.
Mendocino County has no countywide inland tree-removal permit for ordinary yard trees. In the Coastal Zone, removing 'major vegetation' requires a Coastal Development Permit. Larger timber harvesting requires a state CAL FIRE Timber Harvesting Plan. Intentionally killing trees and leaving them standing can be a public nuisance under Chapter 8.400.
Chapter 8.77 of the Mendocino County Code makes flammable weeds, dry brush, combustible material and rubbish that create a fire hazard a public nuisance in unincorporated areas. The County Building Official can order abatement; enforcement runs through the Chapter 8.75 nuisance procedure with fines up to $1,000 per violation per day.
Mendocino County's own water-conservation code (Chapter 16.24) regulates indoor plumbing fixtures, not outdoor watering schedules. Countywide outdoor water-waste rules come from the State Water Board's permanent prohibitions (effective Jan 1, 2025): no hosing pavement, no runoff, and no irrigating within 48 hours of measurable rain. Local water districts may add stricter rules.
Mendocino County has no ordinance restricting residential rainwater harvesting, and none is needed: California's Rainwater Capture Act of 2012 lets any landowner install and operate rain barrels and rooftop capture systems for outdoor, non-potable use without a local permit or a state water right. Larger cistern plumbing tied to buildings still follows the state plumbing code.
Mendocino County does not mandate native landscaping, but its Chapter 9A.32 adopts California's Model Water Efficient Landscaping Ordinance (MWELO) for larger projects, which favors low-water, climate-appropriate plants. In the Coastal Zone, native and sensitive-habitat vegetation gets added protection under the Environmentally Sensitive Habitat rules.
Mendocino County has no ordinance specifically banning or restricting artificial turf on unincorporated residential property. Synthetic lawns are an accepted water-saving option and are a recognized compliance path under California's AB 1572 non-functional turf law. Standard County building, drainage and setback rules still apply to any associated structures.
Backyard composting is allowed and encouraged in unincorporated Mendocino County. Under California's SB 1383, organic-waste recycling is mandatory: the County's Title 9A solid-waste code governs organics collection, and Chapter 9A.32 requires recycled compost and mulch in qualifying landscape projects. Residents must keep compost from becoming a nuisance or fire hazard.
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