Parcel Context · Public-Records Property BriefAPN 045-111-10
50 Mountain Ln
Mill Valley 94941 · Muir Woods Park · Unincorporated Marin · Coordinates: 37.90464, -122.56805
Parcel & Assessor
- Lot size:
- 6,795 sq ft (0.16 ac)
- Assessor use:
- Single-Resid. - Unimproved
- Addresses on lot:
- 50 MOUNTAIN LN
Zoning & Land Use
R1-B2 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B2 (single-family residential): state law allows ADUs where homes are allowed. The assessor lists the lot as vacant: an ADU needs an existing or proposed main home.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B2, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B2, a single-family residential zone. The lot is 6,795 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0465E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
HUD Small Area FMR (ZIP 94941) · FY 2026
Studio $2,730 · 1BR $3,270 · 2BR $3,960 · 3BR $5,060 · 4BR $5,240
ACS 2020–2024 Median Gross Rent (Muir Woods Park):$3,500+ Source: ACS 2020–2024 5-year estimates. Geography: Muir Woods Park.
ACS 2020–2024 Median Gross Rent (ZIP 94941):$3,100±$331 Source: ACS 2020–2024 5-year estimates. Geography: Mill Valley.
Zillow Home Value Index (ZIP 94941, September 2026):$2,181,389
ACS 2020–2024 Median Home Value (Muir Woods Park):$1,747,000±$325,000 Source: ACS 2020–2024 5-year estimates. Geography: Muir Woods Park.
ACS 2020–2024 Median Home Value (ZIP 94941):
Permit & Project History on This Parcel (4 permits, 1 grouped projects)
New home at 50 Mountain LnStage: Issued · 1 units · $660,000 declared valuation · Last record Oct 21, 2026
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 182790 | New single-family home | Issued | Iss. Oct 21, 2026 | $660,000 | New S F D; Garage, Covered Porches; Decks |
| 182788 | General repair | Issued | Iss. Oct 21, 2026 | $20,000 | Retaining Wall @ Septic System |
| 92166 | General repair | Applied | App. May 9, 2024 | $30,000 | Ret Walls @ Driveway And Wing Wall |
| 92089 | General repair | Applied | App. Apr 15, 2024 | $40,000 | Retaining Wall Lower Lot |
1 entry (report years 2022).