Parcel Context · Public-Records Property BriefAPN 047-112-28
409 A Montford Ave
Mill Valley 94941 · Homestead · Unincorporated Marin · Coordinates: 37.89783, -122.54874
Parcel & Assessor
- Lot size:
- 14,593 sq ft (0.34 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 409A MONTFORD AVE; 409 MONTFORD AVE
Zoning & Land Use
R1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1, a single-family residential zone. The lot is 14,593 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 (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 06041C0468F, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
HUD Small Area FMR (ZIP 94941) · FY 2026
Studio $2,730 · 1BR $3,270 · 2BR $3,960 · 3BR $5,060 · 4BR $5,240
ACS 2020–2024 Median Gross Rent (Homestead):$3,500+ Source: ACS 2020–2024 5-year estimates. Geography: Homestead.
ACS 2020–2024 Median Gross Rent (ZIP 94941):$3,100±$331 Source: ACS 2020–2024 5-year estimates. Geography: Mill Valley.
Zillow Home Value Index (ZIP 94941, September 2026):$2,181,389
ACS 2020–2024 Median Home Value (Homestead):$2,000,000+ Source: ACS 2020–2024 5-year estimates. Geography: Homestead.
ACS 2020–2024 Median Home Value (ZIP 94941):
Permit & Project History on This Parcel (9 permits, 2 grouped projects)
Accessory dwelling unit at 409 Montford Ave (adu 409a)Stage: Issued · 1 units · $75,000 declared valuation · Last record Sep 24, 2026
New home at 409 Montford AveStage: Issued · 1 units · $1,100,000 declared valuation · Last record Sep 29, 2014
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 182617 | Accessory dwelling unit (new or conversion) | Issued | Iss. Sep 24, 2026 | $75,000 | Conversion Of (E) Space Into J A D U, Along With An A D U Addition Within The (E) Crawl Space Area. |
| 94527 | Pool / spa | Applied | App. Sep 16, 2026 | $300,000 | New Pool And Pool Patio, Outdoor Kitchen |
| 165885 | Solar / battery storage | Issued | Iss. Oct 2, 2020 | $40,000 | Energy Storage System |
| 165463 |