75 Horseshoe Hill Rd
Bolinas 94924 · Bolinas · Unincorporated Marin · Coordinates: 37.92262, -122.69886
Executive Verdict · Public-Records Synthesis
Zoned C-ARP-5 in Unincorporated Marin and mapped CAL FIRE high fire hazard severity zone (state responsibility area) / Alquist-Priolo fault due diligence; benchmark value $1,985,000 ($1,747,000–$2,223,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$17,280 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Sep 18, 2025).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE High Fire Hazard Severity Zone (State Responsibility Area) (about 98% 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
New home at 75 Horseshoe Hill Rd: Active in "Issued" for 2.5 yr (first record May 30, 2024) with no new permit activity recorded in 2.2 yr.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Parcel & Assessor
- Lot size:
- 283,576 sq ft (6.51 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 75 HORSESHOE HILL RD
Zoning & Land Use
C-ARP-5 — Agriculture Residential Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned C-ARP-5 (agricultural): ADUs are allowed if the zone allows a home, which depends on the zone's rules.
- SB 9: two homes on the lotUnlikely
Zoned C-ARP-5 (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned C-ARP-5 (agricultural), not a single-family residential zone.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (State Responsibility Area) (about 98% of the lot, map Apr 1, 2024); Very High Fire Hazard Severity Zone (State Responsibility Area) (about 2% of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0440E, 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: $1,747,000 – $2,223,000 · 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 75 Horseshoe Hill Rd (Issued)On this parcel
Active in "Issued" for 2.5 yr (first record May 30, 2024) with no new permit activity recorded in 2.2 yr.
- Accessory dwelling unit at 15 Schipper Ln (Applied)0.45 mi SW
In "Applied" for 3.9 yr (since Dec 28, 2022), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Entity-resolved builders & contractors in ½ mile: Seegert Construction (5 on parcel, 5 in ½ mi · New garage / accessory structure); Sun First! (1 on parcel, 1 in ½ mi · Solar / battery storage); King Electric (1 on parcel, 1 in ½ mi · Other); Owner Builder (5 in ½ mi · Accessory dwelling unit (new or conversion)); Precision Build (5 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (7 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B43949 | Solar / battery storage | Issued | Iss. Sep 18, 2025 | $170,100 | Install (71)roof mounted PV solar modules with (71) micro-inverters, (5) Powerwall 3 and (2) Gateway 3 |
| B42094 | Other | Issued | Iss. Apr 21, 2025 | $60,000 | Installation of new permanently mounted back-up diesel generator |
| 177974 | General repair | Issued | Iss. Oct 29, 2024 | $50,000 | Wood Retaining Wall |
| 177973 | New garage / accessory structure | Issued | Iss. Oct 29, 2024 | $150,000 | New Hay & Manure Shed |