Rough and Ready

Nevada County (population ~102,000) is a Sierra Nevada gold-country county on the western slope between the Sacramento Valley foothills and the Sierra crest at Donner Summit. Incorporated cities are Grass Valley (the largest, ~13,000), Nevada City (the historic county seat, a registered National Historic Landmark District), and the Town of Truckee (which incorporated in 1993 and includes a small slice of the Lake Tahoe Basin north of the lake). Major unincorporated communities include Penn Valley, Rough and Ready, Washington (a Gold Rush ghost town), Lake of the Pines, North San Juan, Cedar Ridge, and the Donner Summit cabin districts. The county is dominated by the Tahoe National Forest (over 60% of land area) and is one of the highest-percentage Williamson Act counties in the Sierra foothills. The Board of Supervisors administers ADU permitting in unincorporated territory under California Government Code Sec. 65852.2 and 65852.22 (state ADU preemption). Practical permitting frictions are dominated by very high fire severity zone coverage following the 2017 Lobo Fire, 2020 Jones Fire, and 2021 River Fire, plus septic/well dependence and TRPA jurisdiction along the small Tahoe Basin segment north of Truckee.

• Nevada County Land Use and Development Code (Title L-II) - Accessory Dwelling Units
• Cal. Gov't Code Sec. 65852.2 (Accessory Dwelling Units)
• Cal. Gov't Code Sec. 65852.22 (Junior Accessory Dwelling Units)
• Tahoe Regional Planning Compact (Pub. Law 96-551)
• Nevada County General Plan Housing Element (6th Cycle, 2021-2029)

State-floor overlay: California state ADU preemption applies in full to unincorporated parcels. Tahoe Basin parcels (the small north-of-Truckee slice in the Tahoe hydrologic basin) are subject to TRPA review, which is discretionary and can override the state ministerial preemption. AB 976 prohibits owner-occupancy mandates on detached ADUs through 2025 expiry. AB 1033 condo-conversion election: not adopted by the county as of last check. HCD oversight: any county ordinance amendment must be submitted to HCD within 60 days per Sec. 65852.2(h). The Tahoe National Forest federal land (over 60% of county acreage) is outside county zoning - Forest Service in-holdings (recreation residences under Forest Service special-use permits) are governed by USFS, not county code.

Nevada County overlays of consequence: CAL FIRE State Responsibility Area / Very High FHSZ across virtually all unincorporated foothills (post-2022 FHSZ map update extended coverage); recent burn footprints (2017 Lobo Fire ~822 acres in Penn Valley, 2020 Jones Fire ~705 acres near Nevada City, 2021 River Fire ~2,600 acres in the Bear River corridor); FEMA SFHA along the Yuba River, Bear River, and Truckee River drainages; Williamson Act on agricultural parcels in Penn Valley and the foothills; TRPA jurisdiction over the small Tahoe Basin slice north of Truckee; Nevada City National Historic Landmark District (the only Gold Rush town with that federal designation); SR-49 (Mother Lode highway) state scenic corridor; and Tahoe National Forest federal land covering more than 60% of county acreage.

• CAL FIRE State Responsibility Area / Very High FHSZ (post-2022 update)
• Recent burn footprints - Lobo (2017), Jones (2020), River (2021)
• Tahoe Regional Planning Agency (TRPA) jurisdiction - Tahoe Basin north of Truckee
• FEMA SFHA - Yuba River / Bear River / Truckee River
• Williamson Act agricultural preserve contracts
• Nevada City National Historic Landmark District
• California Scenic Highway System - SR-49 / SR-20
• Tahoe National Forest federal land

Nevada County Planning Department issues all ADU permits for unincorporated parcels; the County Building Department handles plan check and inspections. Practical permitting frictions: CAL FIRE State Responsibility Area covers nearly all rural foothills (Very High to High FHSZ across most of unincorporated territory); 2017 Lobo Fire, 2020 Jones Fire, and 2021 River Fire burn-footprint parcels carry post-fire defensible-space and access-road conditions of approval; septic/well dependence outside the Nevada Irrigation District (NID) and small community service districts (Penn Valley, Lake Wildwood, Lake of the Pines); steep-slope grading review in foothill terrain; oak woodland habitat considerations; short-term-rental tension in the Donner Summit cabin districts and historic Nevada City periphery. The county's housing element commits to ADU streamlining as a key infill strategy.