187 Seadrift Rd
Stinson Beach 94970 · Stinson Beach · Unincorporated Marin · Coordinates: 37.90653, -122.66093
Executive Verdict · Public-Records Synthesis
Zoned C-RSPS-1.4 in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA A flood / CAL FIRE high fire hazard severity zone (local responsibility area) due diligence; benchmark value $3,045,000 ($2,680,000–$3,410,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone C-RSPS-1.4 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
- ✓ Documented permitted upgrades (+$42,047 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Jan 9, 2020).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (A, about 14% of the lot of lot)
Zone A: 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 (Local Responsibility Area) (about 72% 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 Mar 24, 2025)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home at 182 Seadrift Rd (280 ft S, issued). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
- ! Year 1 Prop 13 tax reset (~$35,468/yr at $3,045,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,956/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Parcel & Assessor
- Lot size:
- 7,492 sq ft (0.17 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 187 SEADRIFT RD
Zoning & Land Use
C-RSPS-1.4 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-RSPS-1.4 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned C-RSPS-1.4, a single-family residential zone. FEMA Special Flood Hazard Area (Zone A) covers about 14% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
- SB 9: split into two lotsPossible, with conditions
Zoned C-RSPS-1.4, a single-family residential zone. The lot is 7,492 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. FEMA Special Flood Hazard Area (Zone A) covers about 14% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (Local Responsibility Area) (about 72% of the lot, map Mar 24, 2025); Moderate Fire Hazard Severity Zone (Local Responsibility Area) (about 28% of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone A: 1% annual chance flood (Special Flood Hazard Area) (about 14% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 86% of the lot) · FIRM panel 06041C0441E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,680,000 – $3,410,000 · Status: Off market
HUD Small Area FMR (ZIP 94970) · FY 2026
Studio $2,090 · 1BR $2,510 · 2BR $3,030 · 3BR $3,870 · 4BR $4,010
Developments Deserving Closer Investigation & Active Area Builders
- New home at 182 Seadrift Rd (Issued)280 ft S
Active in "Issued" for 5.9 yr (first record Dec 15, 2020) with no new permit activity recorded in 5.4 yr. High-impact scale (1 housing unit, $2,875,000 declared valuation across 1 permit).
- New home at 196 Seadrift Rd (Issued)410 ft SW
Active in "Issued" for 9.4 yr (first record Jun 19, 2017) with no new permit activity recorded in 9.3 yr. High-impact scale (1 housing unit, $1,485,000 declared valuation across 1 permit).
- New home at 73 Dipsea Rd (Issued)0.15 mi NE
Active in "Issued" for 8 yr (first record Nov 13, 2018) with no new permit activity recorded in 7.8 yr. High-impact scale (1 housing unit, $925,000 declared valuation across 1 permit).
- New home at 150 Seadrift Rd (Issued)0.22 mi SE
Active in "Issued" for 10.2 yr (first record Sep 6, 2016) with no new permit activity recorded in 9.9 yr. High-impact scale (1 housing unit, $1,750,000 declared valuation across 1 permit).
Entity-resolved builders & contractors in ½ mile: Mcleran (1 on parcel, 1 in ½ mi · Roof replacement); Old Town Glass (1 on parcel, 1 in ½ mi · Windows / doors / siding); Gubbins Building (17 in ½ mi · New single-family home); Peterson Construction And Development (8 in ½ mi · New single-family home); Allen Construction (8 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (4 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 163879 | Remodel / interior alteration | Issued | Iss. Jan 9, 2020 | $85,000 | Rmdl Kitchen, 2 Bathrms, Laundry, Add Elec Non Vent Fire Place, Replace 2 Sliding Doors T.D. 11/28/19 |
| 150935 | Solar / battery storage | Issued | Iss. Feb 25, 2016 | $24,138 | P V Sys 4.5 K W - Express |
| 150024 | Roof replacement | Issued | Iss. Dec 3, 2015 | $20,250 | Reroof - E-Insp |
| 141550 | Windows / doors / siding | Issued | Iss. Feb 11, 2014 | $14,588 | Replace 2 Sliding Door, 3 Windows |