64 Shell Rd
Mill Valley 94941 · Alto · Unincorporated Marin · Coordinates: 37.90646, -122.52290
Parcel & Assessor
- Lot size:
- 13,112 sq ft (0.30 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 64 SHELL RD
Zoning & Land Use
RA-B2 — Residential Agriculture (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RA-B2 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotCan't tell
Zoned RA-B2 (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
- SB 9: split into two lotsCan't tell
Zoned RA-B2 (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
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 AO: 1% annual chance flood (Special Flood Hazard Area) (all of the lot) · FIRM panel 06041C0467F, 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: $1,937,000 – $2,465,000 · 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
Developments Deserving Closer Investigation & Active Area Builders
- New home at 64 Shell Rd (Issued)On this parcel
Active in "Issued" for 12.9 yr (first record Dec 19, 2013) with no new permit activity recorded in 12.5 yr.
- New home at 30 Shell Rd (Issued)0.23 mi E
Active in "Issued" for 2.3 yr (first record Jul 5, 2024) with no new permit activity recorded in 22 mo. High-impact scale (1 housing unit, $2,800,000 declared valuation across 1 permit).
- Accessory dwelling unit at 55 Plaza Dr (adu 55a) (Issued)0.31 mi SE
Active in "Issued" for 2.5 yr (first record Apr 17, 2024) with no new permit activity recorded in 19 mo. High-impact scale (1 housing unit, $790,000 declared valuation across 1 permit).
- Accessory dwelling unit at 70 Shell Rd (Applied)160 ft W
Active in "Applied" for 4.2 yr (first record Aug 18, 2022) with no new permit activity recorded in 3.6 yr.
Permit & Project History on This Parcel (3 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 142265 | New garage / accessory structure | Issued | Iss. Apr 15, 2014 | $25,000 | New Storage Builidng T.D 3/6/14 |
| 142264 | Addition (adds square footage) | Issued | Iss. Apr 15, 2014 | $72,000 | Guest House T.D. 3/6/14 Note: This Application Is Included With #501254 (Garage And Sfd) |
| 142261 | New single-family home | Issued | Iss. Apr 15, 2014 | $445,000 | New Single Family Dwelling T.D. 3/6/14 Imaged With 142264,142265 |