19485 State Route 1
Marshall 94940 · East Shore · Unincorporated Marin · Coordinates: 38.15295, -122.89002
Executive Verdict · Public-Records Synthesis
Zoned C-RSP-0.5 in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA VE flood / CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,656,000 ($1,457,000–$1,855,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone C-RSP-0.5 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$21,313 contributory est.)
Public building records show issued construction/renovation work on this parcel (3 total permits, latest Feb 4, 2024).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (VE, about 61% 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 Moderate Fire Hazard Severity Zone (State Responsibility Area) (about 93% 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)
- ! Year 1 Prop 13 tax reset (~$19,494/yr at $1,656,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,625/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:
- 9,540 sq ft (0.22 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 19485 STATE ROUTE 1
Zoning & Land Use
C-RSP-0.5 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-RSP-0.5 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned C-RSP-0.5, a single-family residential zone. FEMA Special Flood Hazard Area (Zone VE) covers about 61% 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-RSP-0.5, a single-family residential zone. The lot is 9,540 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 VE) covers about 61% 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
- Moderate Fire Hazard Severity Zone (State Responsibility Area) (about 93% of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone VE: 1% annual chance flood (Special Flood Hazard Area) (about 61% of the lot); Zone X: minimal flood hazard (about 39% of the lot) · FIRM panel 06041C0095E, 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: $1,457,000 – $1,855,000 · Status: Off market
HUD Small Area FMR (ZIP 94940) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $3,870 · 4BR $4,090
Developments Deserving Closer Investigation & Active Area Builders
Entity-resolved builders & contractors in ½ mile: Sun First (1 on parcel, 1 in ½ mi · Solar / battery storage); Production Engineering And Construction (1 on parcel, 1 in ½ mi · Solar / battery storage); Clearview Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Owner Builder (2 in ½ mi · Commercial tenant improvement).
Permit & Project History on This Parcel (3 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B36905 | Electrical / panel | Issued | Iss. Feb 4, 2024 | $4,200 | Replace existing 200 Amp electrical service with new 200 Amp Electrical service. — Service Upgrade |
| 166056 | Solar / battery storage | Issued | Iss. Oct 27, 2020 | $28,100 | Energy Styorage System |
| 160841 | Solar / battery storage | Issued | Iss. Feb 26, 2019 | $36,120 | Rooftop Solar 8.4 K W - Express |