307 Dolan Ave
Mill Valley 94941 · Tamalpais · Unincorporated Marin · Coordinates: 37.87940, -122.52882
Parcel & Assessor
- Lot size:
- 8,886 sq ft (0.20 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 307 DOLAN AVE
Zoning & Land Use
R1-B1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B1, a single-family residential zone. The lot is 8,886 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: $2,066,000 – $2,630,000 · 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 October 2024)
22 active or recent development projects (20 housing units across completed, permitted, and pipeline stages) and 585 total building permits recorded within ½ mile.
- New construction19 permits (3 units)
- Adds housing (ADU)16 permits (16 units)
- Demolition1 permit
- Additions & renovations38 permits
- Building systems420 permits
- Repairs28 permits
- Other63 permits
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 307 Dolan Ave (Issued)On this parcel
Active in "Issued" for 6 yr (first record Oct 13, 2020) with no new permit activity recorded in 5.7 yr.
- Demolition at 307 Dolan Ave (Issued)On this parcel
Active in "Issued" for 9.6 yr (first record Mar 28, 2017) with no new permit activity recorded in 9.6 yr.
- New home at 334 Dolan Ave (Issued)0.12 mi NW
Active in "Issued" for 8.1 yr (first record Sep 5, 2018) with no new permit activity recorded in 7.9 yr. High-impact scale (1 housing unit, $759,000 declared valuation across 1 permit).
- Accessory dwelling unit at 403 Marin Ave (adu 403a) (Issued)0.39 mi W
Active in "Issued" for 2.9 yr (first record Dec 21, 2023) with no new permit activity recorded in 18 mo. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
Permit & Project History on This Parcel (8 permits, 2 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 89720 | Addition (adds square footage) | Applied | App. Apr 5, 2022 | $25,000 | Addition: Extend [E] Bedroom & Add Office Addendum To Permit#167130 |
| 167130 | Accessory dwelling unit (new or conversion) | Issued | Iss. Feb 10, 2021 | $150,000 | Addition, Struct Inter. Remodel On Main/Lower Level T.D. 11-4-20 |
| 155465 | Remodel / interior alteration | Issued | Iss. May 16, 2017 | $5,500 | Bath Rmdl - Express |
| 155160 | Electrical / panel | Issued | Iss. Apr 11, 2017 | $500 | Upgr Main Panel To 200 A***Expired |
| 155039 | Demolition | Issued | Iss. Mar 28, 2017 | $250 | Demo Chimney - No Replacement***Expired |
| 154843 | Windows / doors / siding | Issued | Iss. Mar 23, 2017 | $9,800 | Repl Windows & Doors - Same Size & Location **Must Meet W U I & Fenestration Requirements |
| 153629 | Windows / doors / siding | Issued | Iss. Oct 26, 2016 | $20,000 | Siding |
| 153627 | Remodel / interior alteration | Issued | Iss. Oct 26, 2016 | $15,000 | Kitchen Remodel-Express - B W O P |