100 Thomas Dr
Mill Valley 94941 · Strawberry · Unincorporated Marin · Coordinates: 37.90621, -122.51131
Parcel & Assessor
- Lot size:
- 254,870 sq ft (5.85 ac)
- Assessor use:
- Single-Resid. - Unimproved
- Addresses on lot:
- 100 THOMAS DR
Zoning & Land Use
RMP-0.2-HOD — Residential Multiple Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RMP-0.2-HOD (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs. The assessor lists the lot as vacant: an ADU needs an existing or proposed main home.
- SB 9: two homes on the lotUnlikely
Zoned RMP-0.2-HOD (multifamily residential), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RMP-0.2-HOD (multifamily residential), not a single-family residential zone.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0469F, 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: $1,872,000 – $2,382,000 · 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 55 Thomas Dr (Applied)On this parcel
Active in "Applied" for 6.2 yr (first record Sep 1, 2020) with no new permit activity recorded in 6.2 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
- 71 new homes (Entitled)On this parcel
High-impact scale (71 housing units across 0 permits).
- New home at 9 Sky Rd (Issued)0.38 mi SE
Active in "Issued" for 12.4 yr (first record Jun 23, 2014) with no new permit activity recorded in 11.6 yr. High-impact scale (1 housing unit, $1,200,000 declared valuation across 1 permit).
- Accessory dwelling unit at 55 Plaza Dr (adu 55a) (Issued)0.38 mi W
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).
Permit & Project History on This Parcel (2 permits, 2 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 86375 | General repair | Applied | App. Sep 1, 2020 | $1,000,000 | Retaining Wall |
| 86374 | New single-family home | Applied | App. Sep 1, 2020 | $1,000,000 | (12) (13) Single Family Dwelling, Garage, Deck T.D. 9-22-20 |
State HCD Housing Element APR records on this parcel: 1 entry (report years 2025).