316 W Blithedale Ave
Mill Valley 94941 · Mill Valley · Coordinates: 37.91649, -122.55259
Parcel & Assessor
- Lot size:
- 8,930 sq ft (0.21 ac)
- Assessor use:
- Single-Resid. - Unimproved
- Addresses on lot:
- 316 W BLITHEDALE AVE
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. 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 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 8,930 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: $1,913,000 – $2,589,000 · 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 —)
8 active or recent development projects (8 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- SFR Tear Down (Issued)On this parcel
Active in "Issued" for 13 mo (first record Oct 1, 2025) with no new permit activity recorded in 13 mo.
- New home (Issued)430 ft S
Active in "Issued" for 10.8 yr (first record Jan 12, 2016) with no new permit activity recorded in 10.8 yr.
- Attached ADU (Entitled)0.13 mi N
Active in "Entitled" for 2.8 yr (first record Jan 4, 2024) with no new permit activity recorded in 2.8 yr.
- ADU Conversion to Legalize space (Entitled)0.17 mi E
Active in "Entitled" for 17 mo (first record Jun 1, 2025) with no new permit activity recorded in 17 mo.
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 2025).