Parcel Context · Public-Records Property BriefAPN 106-280-15

17683 State Route 1

Marshall 94940 · East Shore · Unincorporated Marin · Coordinates: 38.13323, -122.87073

Executive Verdict · Public-Records Synthesis

Zoned C-RSP-0.33 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 $1,714,000 ($1,508,000–$1,920,000).

Upsides & Opportunities

✓ Ministerial ADU / JADU pathway likely eligible
Zone C-RSP-0.33 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
✓ 1 documented municipal building permit on file
On-parcel permit history is indexed through Sep 18, 2024, 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 30% 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 81% 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 (~$20,161/yr at $1,714,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,680/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:: 17,903 sq ft (0.41 ac)
Assessor use:: Single-Resid. - Improved
Addresses on lot:: 17683 STATE ROUTE 1

Zoning & Land Use

C-RSP-0.33 — Residential Single Family Planned (Unincorporated Marin)

State Housing Pathways Screen (ADU & SB 9)

ADU or junior ADULikely eligible
Zoned C-RSP-0.33 (single-family residential): state law allows ADUs where homes are allowed.
SB 9: two homes on the lotPossible, with conditions
Zoned C-RSP-0.33, a single-family residential zone. FEMA Special Flood Hazard Area (Zone VE) covers about 30% 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-0.33, a single-family residential zone. The lot is 17,903 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 30% 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 81% of the lot, map Apr 1, 2024)
FEMA National Flood Hazard Layer: Zone VE: 1% annual chance flood (Special Flood Hazard Area) (about 30% of the lot); Zone X: minimal flood hazard (about 70% of the lot) · FIRM panel 06041C0115E, effective August 15, 2017
CGS Alquist-Priolo Earthquake Fault Zone: Not in an Alquist-Priolo Earthquake Fault Zone

Surrounding Rent & Value Benchmarks (Public Records)

Estimated Price (ZIP ZHVI + Neighborhood ACS + Permit Model):$1,714,000

Range: $1,508,000 – $1,920,000 · 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

ACS 2020–2024 Median Gross Rent (East Shore):$1,439±$204

ACS 2020–2024 Median Gross Rent (ZIP 94940):$1,439±$204

Zillow Home Value Index (ZIP 94940, September 2026):$1,537,070

ACS 2020–2024 Median Home Value (East Shore):$1,668,000±$271,000

ACS 2020–2024 Median Home Value (ZIP 94940):$1,668,000±$271,000

Nearby Activity (½ mile radius, since —)

0 active or recent development projects and 0 total building permits recorded within ½ mile.

Developments Deserving Closer Investigation & Active Area Builders

Entity-resolved builders & contractors in ½ mile: Creative Roofing Of Northern California (1 on parcel, 1 in ½ mi · Roof replacement); Pacific Ridge Construction (1 in ½ mi · New garage / accessory structure).

Permit & Project History on This Parcel (1 permits, 0 grouped projects)

Record #	Category	Status	Applied / Issued	Valuation	Description
B39531	Roof replacement	Issued	Iss. Sep 18, 2024	$60,800	Tear off and reroof residence with Class A fire rated asphalt shingle, install 20 squares in total. — ReRoofing

Executive Verdict · Public-Records Synthesis

Upsides & Opportunities

✓ Ministerial ADU / JADU pathway likely eligible
Zone C-RSP-0.33 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
✓ 1 documented municipal building permit on file
On-parcel permit history is indexed through Sep 18, 2024, 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 30% 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 81% 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 (~$20,161/yr at $1,714,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,680/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector

State Housing Pathways Screen (ADU & SB 9)

ADU or junior ADULikely eligible

Zoned C-RSP-0.33 (single-family residential): state law allows ADUs where homes are allowed.

SB 9: two homes on the lotPossible, with conditions

Zoned C-RSP-0.33, a single-family residential zone. FEMA Special Flood Hazard Area (Zone VE) covers about 30% 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-0.33, a single-family residential zone. The lot is 17,903 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 30% 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 81% of the lot, map Apr 1, 2024)

FEMA National Flood Hazard Layer

Zone VE: 1% annual chance flood (Special Flood Hazard Area) (about 30% of the lot); Zone X: minimal flood hazard (about 70% of the lot) · FIRM panel 06041C0115E, effective August 15, 2017

CGS Alquist-Priolo Earthquake Fault Zone

Not in an Alquist-Priolo Earthquake Fault Zone