239 Summit Ave
Mill Valley 94941 · Mill Valley · Coordinates: 37.90984, -122.55263
Parcel & Assessor
- Lot size:
- 20,952 sq ft (0.48 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 239 SUMMIT AVE; 239 SUMMIT AVE UNIT A
Zoning & Land Use
RS-7.5 — Single Fam Res (min 7,500 SF) (Mill Valley)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RS-7.5 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RS-7.5, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RS-7.5, a single-family residential zone. The lot is 20,952 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 (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0466F, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,040,000 – $2,760,000 · 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 October 2024)
14 active or recent development projects (18 housing units across completed, permitted, and pipeline stages) and 1 total building permits recorded within ½ mile.
- Other
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)0.4 mi E
Active in "Entitled" for 6.1 yr (first record Sep 9, 2020) with no new permit activity recorded in 6.1 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
- MFR/Office Overlay (Entitled)0.43 mi SE
Active in "Entitled" for 13 mo (first record Oct 13, 2025) with no new permit activity recorded in 13 mo. High-impact scale (5 housing units across 0 permits).
- New home (Entitled)320 ft SE
Active in "Entitled" for 12 mo (first record Oct 21, 2025) with no new permit activity recorded in 12 mo.
- New home (Issued)0.11 mi E
Active in "Issued" for 9.4 yr (first record May 23, 2017) with no new permit activity recorded in 9.4 yr.
Permit & Project History on This Parcel (0 permits, 1 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 2 entries (report years 2022, 2025).