1601 Shoreline Hwy
Mill Valley 94941 · Unincorporated Marin · Coordinates: 37.86776, -122.56350
Executive Verdict · Public-Records Synthesis
Zoned A60 in Unincorporated Marin and mapped FEMA A flood / CAL FIRE very high fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,234,000 ($1,899,000–$2,569,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$52,800 contributory est.)
Public building records show issued construction/renovation work on this parcel (17 total permits, latest May 27, 2026).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (A, about 2% 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 Very 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)
- ! Delayed or open permit activity on this parcel
New home at 1601 Shoreline Hwy: Active in "Issued" for 12.9 yr (first record Dec 10, 2013) with no new permit activity recorded in 12.5 yr. High-impact scale ($1,200,000 declared valuation across 1 permit).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! Year 1 Prop 13 tax reset (~$26,141/yr at $2,234,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,178/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:
- 2,909,852 sq ft (66.80 ac)
- Assessor use:
- Exemption - Improved
- Addresses on lot:
- 1601 SHORELINE HWY
Zoning & Land Use
A60 — Agriculture and Conservation (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned A60 (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 A60 (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned A60 (agricultural), not a single-family residential zone.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Very High Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone A: 1% annual chance flood (Special Flood Hazard Area) (about 2% of the lot); Zone X: minimal flood hazard (about 98% of the lot) · FIRM panel 06041C0505E, 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: $1,899,000 – $2,569,000 · Status: Off market
HUD Small Area FMR (ZIP 94941) · FY 2026
Studio $2,730 · 1BR $3,270 · 2BR $3,960 · 3BR $5,060 · 4BR $5,240
Nearby Activity (½ mile radius, since November 2024)
0 active or recent development projects and 5 total building permits recorded within ½ mile.
- Additions & renovations1 permit
Developments Deserving Closer Investigation & Active Area Builders
- New home at 1601 Shoreline Hwy (Issued)On this parcel
Active in "Issued" for 12.9 yr (first record Dec 10, 2013) with no new permit activity recorded in 12.5 yr. High-impact scale ($1,200,000 declared valuation across 1 permit).
- Remodel / interior alteration (179754) (Issued)On this parcel
Issued after 11 mo (4.2× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
- General repair (74505) (Applied)On this parcel
Pending in review for 11.4 yr (50.0× the 83d median) — slower than 90% of general repair permits in Unincorporated Marin (median 83d, 90th pct 328d, n=693).
- General repair (179122) (Issued)On this parcel
Issued after 8 mo (2.8× the 83d median) — above the 75th percentile for general repair permits in Unincorporated Marin (median 83d, 75th pct 181d, n=693).
Entity-resolved builders & contractors in ½ mile: Kaufman Construction (4 on parcel, 4 in ½ mi · General repair); Residential And Commercial Roofing (3 on parcel, 3 in ½ mi · Roof replacement); Owner (2 on parcel, 2 in ½ mi · Remodel / interior alteration); Marin County Roofing (2 on parcel, 2 in ½ mi · Roof replacement); Prunuske Chatham (1 on parcel, 1 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (17 permits, 1 grouped projects)
Showing 15 most recent permits| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B46934 | Roof replacement | Issued | Iss. May 27, 2026 | $13,968 | ReRoofing |
| B46933 | Roof replacement | Issued | Iss. May 27, 2026 | $14,885 | ReRoofing |
| B46932 | Roof replacement | Issued | Iss. May 27, 2026 | $40,585 | ReRoofing |
| 179754 | Remodel / interior alteration | Issued | Iss. Jul 29, 2025 | $100,000 | Repair Fire Damaged Building |