100 Brighton Ave
Bolinas 94924 · Bolinas · Unincorporated Marin · Coordinates: 37.90466, -122.68626
Executive Verdict · Public-Records Synthesis
Zoned C-RA-B2 in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA VE flood / CAL FIRE high fire hazard severity zone (state responsibility area) / Alquist-Priolo fault due diligence; benchmark value $2,083,000 ($1,833,000–$2,333,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone C-RA-B2 allows residential use qualifying for ministerial ADU review under state law (2 ADU permits permitted within ¼ mile in 36 months).
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ 7 documented municipal building permits on file
On-parcel permit history is indexed through Jul 14, 2026, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (VE, about 2% of the lot of lot)
Zone VE: 1% annual chance flood (Special Flood Hazard Area) overlaps this parcel. Expect mandatory flood insurance for federally backed loans and floodplain elevation/mitigation rules for new units or SB 9 applications.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE High Fire Hazard Severity Zone (State Responsibility Area) (all of the lot of lot)
Located in a mapped Fire Hazard Severity Zone. Expect Chapter 7A ignition-resistant building standards, defensible-space inspections, and stricter property insurance underwriting.
Source: CAL FIRE FHSZ (map Apr 1, 2024)
- ! Alquist-Priolo Earthquake Fault Zone (all of the lot of lot)
Intersects a State-mapped surface fault rupture zone. Adding habitable structures or subdividing typically requires a site-specific geologic fault investigation.
Source: California Geological Survey Alquist-Priolo Zones
- ! Delayed or open permit activity on this parcel
Other (182119): Issued after 3 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Parcel & Assessor
- Lot size:
- 12,458 sq ft (0.29 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 100 BRIGHTON AVE
Zoning & Land Use
C-RA-B2 — Residential Agriculture (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-RA-B2 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotCan't tell
Zoned C-RA-B2 (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
- SB 9: split into two lotsCan't tell
Zoned C-RA-B2 (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone VE: 1% annual chance flood (Special Flood Hazard Area) (about 2% of the lot); Zone VE: 1% annual chance flood (Special Flood Hazard Area) (about 19% of the lot); Zone X: minimal flood hazard (about 80% of the lot) · FIRM panel 06041C0443E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Alquist-Priolo Earthquake Fault Zone (Bolinas quadrangle) (all of the lot)
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,833,000 – $2,333,000 · Status: Off market
HUD Small Area FMR (ZIP 94924) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $3,730 · 4BR $3,960
Developments Deserving Closer Investigation & Active Area Builders
- New home at 52 Crescente Ave (Applied)0.19 mi NE
In "Applied" for 2.3 yr (since Jul 11, 2024), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, $2,750,000 declared valuation across 1 permit).
- Other (182119) (Issued)On this parcel
Issued after 3 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
- Other (93985) (Applied)On this parcel
Pending in review for 9 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
- New commercial building at 72 Wharf Rd (Issued)0.39 mi N
Active in "Issued" for 5.5 yr (first record May 13, 2021) with no new permit activity recorded in 3.1 yr. High-impact scale ($1,980,000 declared valuation across 2 permits).
Entity-resolved builders & contractors in ½ mile: Nemec Construction (1 on parcel, 2 in ½ mi · Addition (adds square footage)); Pete Moffat Construction (2 on parcel, 2 in ½ mi · Electrical / panel); Alvila Group Construction (1 on parcel, 1 in ½ mi · General repair); Sunshine Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Owner (5 in ½ mi · Commercial tenant improvement).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 182119 | Other | Issued | Iss. Jul 14, 2026 | $10,000 | Temporary Beach Access Stairs While Seawall Is Being Repaired - Related To Bp#181994 |
| 181994 | General repair | Issued | Iss. Jun 24, 2026 | $4,804,631 | Re-Build Seawall; Retaining Wall; Fences; West Stairs; Private Stairs |
| 93985 | Other | Applied | App. Feb 11, 2026 | — | East Stairs To Viewing Area - W I T H D R A W N 2/2/26 Nh |
| B33868 | Roof replacement | Issued | Iss. May 15, 2023 | $18,000 | Reroof.T/O. Install comp. shingle GAF UHD 50YR roof. 60 sqs — ReRoofing |
| 142343 | Windows / doors / siding | Issued | Iss. Apr 22, 2014 |