306 Richardson Dr
Mill Valley 94941 · Strawberry · Unincorporated Marin · Coordinates: 37.89176, -122.50710
Parcel & Assessor
- Lot size:
- 12,720 sq ft (0.29 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 306 RICHARDSON DR; 308 RICHARDSON DR
Zoning & Land Use
R1-B2 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B2 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B2, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B2, a single-family residential zone. The lot is 12,720 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
- Not in a State-mapped fire hazard severity zone
- 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: $2,149,000 – $2,735,000 · 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
- Accessory dwelling unit at 306 Richardson Dr A K A (Issued)On this parcel
Active in "Issued" for 7.6 yr (first record Mar 14, 2019) with no new permit activity recorded in 7.4 yr.
- Accessory dwelling unit at 308 Richardson Dr (Applied)On this parcel
Active in "Applied" for 7.6 yr (first record Mar 14, 2019) with no new permit activity recorded in 7.6 yr.
- New home at 218 Meda Ln (Applied)410 ft NW
Active in "Applied" for 6.5 yr (first record Apr 30, 2020) with no new permit activity recorded in 6.5 yr. High-impact scale (1 housing unit, $850,000 declared valuation across 1 permit).
- New home at 82 Vista Del Sol (Issued)0.31 mi NW
Active in "Issued" for 12.2 yr (first record Aug 7, 2014) with no new permit activity recorded in 12.1 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
Permit & Project History on This Parcel (6 permits, 2 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B46307 | Roof replacement | Issued | Iss. Mar 26, 2026 | $13,000 | ReRoofing |
| B38442 | Other | Issued | Iss. Jun 18, 2024 | $25,000 | Kitchen renovation. There will be no structural changes. Plans are for new flooring countertops, and appliances. |
| B26956 | HVAC / heat pump | Issued | Iss. Sep 9, 2021 | $4,800 | New Mini Split Heat and air conditioner pump — New Circuits / Outlets; Mechanical Appliance |
| B26954 |