Covelo

Mendocino County is a north-coast California county (population ~91,000) spanning Pacific coast redwood communities (Fort Bragg, Mendocino village, Point Arena, Gualala), the inland Highway 101 corridor (Ukiah county seat, Willits, Hopland, Laytonville, Covelo), and Anderson Valley wine country (Boonville, Philo, Yorkville). Two incorporated cities (Fort Bragg and Point Arena coastal, plus Ukiah and Willits inland - four cities total) plus extensive unincorporated coast and interior. The county Board of Supervisors administers ADUs in unincorporated areas under California Government Code Sec. 65852.2 and 65852.22 (state ADU preemption, as amended by AB 68/881, SB 13, AB 670/3182, AB 2221/SB 897, AB 976, and AB 1033). Mendocino County is unusually heavily layered: the Local Coastal Program (LCP) under the California Coastal Act of 1976 (Pub. Resources Code Sec. 30000 et seq.) applies to the entire western coastal zone (Highway 1 corridor and west) and adds a Coastal Development Permit (CDP) requirement on top of state ADU preemption; the county's commercial cannabis ordinance (Mendocino County Code Title 10A.17, originally adopted post-Prop 64 / 2016) governs licensed cannabis cultivation and adds parcel-use overlay rules that interact with ADU siting on cannabis-licensed parcels.

• Mendocino County Code Title 20 (Coastal Zoning) and Division II (Inland Zoning), ADU/JADU provisions
• Cal. Gov't Code Sec. 65852.2 (Accessory Dwelling Units)
• Cal. Gov't Code Sec. 65852.22 (Junior Accessory Dwelling Units)
• Cal. Pub. Resources Code Sec. 30000 et seq. (California Coastal Act of 1976)
• Mendocino County Code Title 10A.17 (Cannabis Cultivation)

State-floor overlay: California state ADU preemption applies in full inland; in the coastal zone, the Coastal Act's CDP requirement is preserved (Coastal Act preemption is concurrent with, not subordinate to, state ADU preemption). AB 1033 condo-conversion election is at the county's option and Mendocino County has not adopted it as of last check. AB 976 prohibits owner-occupancy mandates on detached ADUs through 2025 expiry. HCD oversight applies to ordinance amendments per Sec. 65852.2(h).

Mendocino County overlays of consequence: California Coastal Zone (LCP-certified) covers the entire coastal strip from the Sonoma County line north to Humboldt County line; CAL FIRE Very High Fire Hazard Severity Zone (FHSZ) covers most of the interior ridge country; California WUI Chapter 7A applies in the FHSZ; FEMA SFHA along the Russian River, Eel River, Big River, and Navarro River drainages; commercial cannabis cultivation overlay (Mendocino County Code Title 10A.17) on licensed parcels; Anderson Valley AVA (American Viticultural Area) and Mendocino AVA wine-grape parcels with significant Williamson Act coverage; multiple federal Wild and Scenic River segments (Eel River and tributaries); coastal redwood and old-growth habitat overlays; and TPZ (Timber Production Zone) parcels under Cal. Gov't Code Sec. 51100 et seq. covering large industrial timberland inholdings.

• California Coastal Zone - Mendocino County certified Local Coastal Program
• CAL FIRE State Responsibility Area / Very High FHSZ
• FEMA SFHA - Russian, Eel, Navarro, Big River drainages
• Mendocino County Commercial Cannabis Cultivation Ordinance
• Williamson Act / TPZ - Anderson Valley AVA and Mendocino AVA wine-grape and timber parcels
• California Scenic Highway System - Highway 1 (Pacific Coast Highway) and Highway 128

Mendocino County Planning and Building Services issues ADU permits for unincorporated parcels (the bulk of the county outside the four incorporated cities). The unincorporated coast (Westport, Albion, Little River, Mendocino village CDP, Elk, Manchester, Anchor Bay, Gualala) sits inside the certified Local Coastal Program zone and requires a Coastal Development Permit (CDP) on top of the standard ADU permit unless the project qualifies under a categorical exclusion. Inland unincorporated areas (Redwood Valley, Calpella, Talmage, Hopland, Boonville, Philo, Yorkville, Laytonville, Covelo, Leggett) follow the standard state-preempted 60-day ministerial path. Practical permitting frictions: very high fire severity zones across most interior ridge country, septic/well dependence outside the small Russian River Valley sewer service areas, steep-slope grading review on coastal terrace bluffs and inland mountains, redwood / oak woodland habitat considerations, sensitive habitat overlays in coastal LCP review, and commercial cannabis ordinance interactions on cultivation-licensed parcels.