ADU Pass
Fiddletown
ADU Pass helps homeowners in Fiddletown, Amador County, California navigate the permit paperwork for building an accessory dwelling unit. This area covers 1 ZIP code.
Map
Amador County — county ADU rules and overlays
County ADU ordinance
Amador County (population ~41,000) sits in the Mother Lode region of the Sierra Nevada foothills. The county seat is Jackson; incorporated cities include Jackson, Sutter Creek, Amador City (smallest incorporated city in California by population), Plymouth, and Ione. The county Board of Supervisors administers ADU permitting in unincorporated territory under California Government Code Sec. 65852.2 and 65852.22 (state ADU preemption regime, as amended by AB 68/881, SB 13, AB 670/3182, AB 2221/SB 897, AB 976, and AB 1033). Unincorporated communities of consequence include Pine Grove, Pioneer, Volcano, River Pines, Fiddletown, and Buckhorn. The county sits in the Shenandoah Valley AVA wine country (over 40 wineries in the unincorporated Plymouth/Fiddletown corridor); ADU applications on parcels with active wineries or tasting rooms can encounter agricultural-mixed-use overlay friction.
- Amador County Code Title 19 - Zoning, Chapter 19.45 ADU/JADU provisions
- Cal. Gov't Code Sec. 65852.2 (Accessory Dwelling Units)
- Cal. Gov't Code Sec. 65852.22 (Junior Accessory Dwelling Units)
- California Williamson Act (Land Conservation Act of 1965, Cal. Gov't Code Sec. 51200 et seq.)
State-floor overlay: California state ADU preemption applies in full to all unincorporated parcels. AB 1033 condo-conversion election is at the county's option; status pending verification. AB 976 prohibits owner-occupancy mandates on detached ADUs. HCD oversight: any county ordinance amendment must be submitted to HCD within 60 days of adoption per Sec. 65852.2(h).
County regulatory overlays
Amador County overlays of consequence: CAL FIRE State Responsibility Area / High to Very High FHSZ over the rural eastern county; Williamson Act agricultural-preserve contracts on wine-country and ranching parcels; FEMA SFHA along the Mokelumne, Cosumnes, and Jackson Creek drainages; historic district designations on Gold Rush-era unincorporated towns (Volcano, Fiddletown); and Mother Lode mineral-rights overlays where pre-existing mining claims affect parcel rights. The Shenandoah Valley AVA (Plymouth/Fiddletown) is an agricultural overlay where wineries and tasting rooms drive mixed-use review for ADUs.
County permitting (unincorporated parcels)
Amador County Planning Department and Building Department jointly issue ADU permits for unincorporated parcels. Practical constraints in the Mother Lode foothills include CAL FIRE State Responsibility Area coverage of nearly all unincorporated terrain (very high to high FHSZ), Williamson Act agricultural-preserve contracts on many wine country parcels (which constrain non-agricultural improvements), septic/well infrastructure (no public sewer outside the incorporated cities), historic-district overlays in Volcano and Fiddletown (Gold Rush-era unincorporated communities with state historical landmark designations), and steep slope constraints requiring engineered foundations.
California state — ADU law and programs
State ADU law
California has the most aggressive statewide ADU preemption regime in the US, built from ~15 bills passed 2019-2025 and enforced by the Department of Housing and Community Development (HCD). The 2026 HCD ADU Handbook addendum (in effect with the 2025 Title 24 code cycle) is the operative state-level reference. The regime does four things at once: (1) preempts local zoning that would ban or unreasonably restrict ADUs; (2) imposes by-right ministerial approval with short statutory deadlines; (3) caps fees and utility-connection charges; and (4) empowers HCD to void non-compliant local ordinances.
State HOA preemption
California has the strongest statewide HOA-preemption regime in the US for accessory dwelling units, built from two bills: AB 670 (2019) voided ADU-prohibiting covenants on single-family residential lots, and AB 3182 (2020) extended and codified the preemption into the Davis-Stirling Common Interest Development Act (Civil Code §§ 4740 / 4741). The combination prohibits common-interest communities from banning ADUs, restricting rentals below 25% of separate interests, or treating ADUs as separate HOA interests. Limits remain: HOAs retain authority over reasonable design standards and statutory height limits, and the 2026 Carlsbad case (CalMatters coverage) established that an HOA's documented design-standards regime can effectively delay or constrain ADU approval short of outright prohibition.
State financing programs
California's flagship state-level ADU financing program — the CalHFA ADU Grant Program — is paused and has not been refunded since the original $100 million allocation was fully deployed 2023-12-28. The program provided up to $40,000 per qualifying homeowner for pre-construction and non-recurring closing costs and financed approximately 2,500 ADUs in two rounds. As of 2026-04, no new funding round has been announced in the state budget. CalHFA continues to publish anti-scam warnings because bad actors actively solicit homeowners claiming access to grant funds that no longer exist. State-level financing activity has shifted to local pilot programs (San Francisco, San Jose, Los Angeles, San Diego) and private financing products (Fannie Mae ADU mortgage, HELOC, construction-to-permanent).
State housing programs
California's state-level ADU programs are concentrated at HCD (technical guidance, ordinance review, enforcement) and the paused CalHFA grant pipeline (covered under stateFinancing). The state does not operate a central pre-approved ADU plan library — instead, AB 1332 (2024) created a preemption framework for local pre-approved plans with a 30-day ministerial-approval deadline, and major cities (Los Angeles, San Diego, San Jose, Sacramento, Berkeley) have rolled out their own plan catalogs. The California YIMBY coalition and other housing-policy organizations play an influential role in bill drafting; they are not state agencies but effectively drive much of the ADU legislative agenda. The Title 24 code cycle (now 2025, in effect for 2026 permits) is the authoritative building-code baseline.
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.
ZIP Code
- 95629
Post Office
- 14283 Jibboom St, 95629