571 Throckmorton Ave
Mill Valley 94941 · Mill Valley · Coordinates: 37.90988, -122.56000
Parcel & Assessor
- Lot size:
- 15,899 sq ft (0.36 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 571 THROCKMORTON AVE; 571 THROCKMORTON AVE A
Zoning & Land Use
RS-10 — Single Fam Res (min 10,000 SF) (Mill Valley)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RS-10 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RS-10, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RS-10, a single-family residential zone. The lot is 15,899 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: $1,998,000 – $2,704,000 · 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 —)
9 active or recent development projects (9 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- New home (Issued)On this parcel
Active in "Issued" for 7.8 yr (first record Jan 4, 2019) with no new permit activity recorded in 7.8 yr.
- Detached ADU (Issued)380 ft SW
Active in "Issued" for 4.2 yr (first record Aug 15, 2022) with no new permit activity recorded in 4.2 yr.
- New home (Issued)520 ft E
Active in "Issued" for 8.8 yr (first record Jan 23, 2018) with no new permit activity recorded in 8.8 yr.
- New home (Issued)520 ft E
Active in "Issued" for 9.1 yr (first record Sep 15, 2017) with no new permit activity recorded in 9.1 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: 1 entry (report years 2019).