418 Median Way
Mill Valley 94941 · Tamalpais · Unincorporated Marin · Coordinates: 37.88620, -122.53287
Parcel & Assessor
- Lot size:
- 27,966 sq ft (0.64 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 418 MEDIAN WAY; 420 MEDIAN WAY
Zoning & Land Use
R1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1, a single-family residential zone. The lot is 27,966 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
- Not in a State-mapped fire hazard severity zone
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0468F, effective March 16, 2016
- 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
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 420 Median Way (Issued)On this parcel
Active in "Issued" for 3.9 yr (first record Nov 29, 2022) with no new permit activity recorded in 3.9 yr.
- New commercial building at 100 Harvard Ave (Issued)0.16 mi N
Active in "Issued" for 22 mo (first record Dec 26, 2024) with no new permit activity recorded in 17 mo. High-impact scale ($6,500,000 declared valuation across 1 permit).
- Accessory dwelling unit at 131 Yale Ave A (Issued)0.24 mi NE
Active in "Issued" for 4.8 yr (first record Jan 19, 2022) with no new permit activity recorded in 3.4 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
- New home at 217 Cleveland Ave (Issued)0.26 mi E
Active in "Issued" for 9.7 yr (first record Feb 21, 2017) with no new permit activity recorded in 2.3 yr. High-impact scale (1 housing unit, $875,000 declared valuation across 1 permit).
Permit & Project History on This Parcel (2 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B31904 | Solar / battery storage | Issued | Iss. Nov 30, 2022 | $25,930 | 3.66 kW AC [4.0 kW DC] Roof Mounted Photovoltaic System Expansion [10 new modules w/ microinverters], Existing Photovolt… |
| B31877 | Accessory dwelling unit (new or conversion) | Issued | Iss. Nov 29, 2022 | $33,550 | Roof Mounted Photovoltaic System (20 modules w/ microinverters) on detached garage. Serves ADU (420 Median Way) |