171 Oak Manor Dr
Fairfax 94930 · Unincorporated Fairfax · Unincorporated Marin · Coordinates: 37.99821, -122.59446
Executive Verdict · Public-Records Synthesis
Zoned R1 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,288,000 ($1,133,000–$1,443,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 7,231 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$15,230 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest Sep 27, 2023).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE Moderate Fire Hazard Severity Zone (State Responsibility Area) (all of the lot of lot)
Located in a mapped Fire Hazard Severity Zone. Expect Chapter 7A ignition-resistant building standards, defensible-space inspections, and stricter property insurance underwriting.
Source: CAL FIRE FHSZ (map Apr 1, 2024)
- ! 4 slow or stalled nearby projects within ½ mile
Closest lead: 54 new homes (0.32 mi W, issued). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
- ! Year 1 Prop 13 tax reset (~$15,262/yr at $1,288,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,272/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Parcel & Assessor
- Lot size:
- 7,231 sq ft (0.17 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 171 OAK MANOR DR
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 7,231 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
- 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 06041C0451E, effective March 17, 2014
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,133,000 – $1,443,000 · Status: Off market
HUD Small Area FMR (ZIP 94930) · FY 2026
Studio $2,230 · 1BR $2,680 · 2BR $3,240 · 3BR $4,140 · 4BR $4,290
Developments Deserving Closer Investigation & Active Area Builders
- 54 new homes (Issued)0.32 mi W
Active in "Issued" for 8 yr (first record Nov 26, 2018) with no new permit activity recorded in 8 yr. High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
- New home (Issued)0.4 mi S
Active in "Issued" for 5.4 yr (first record Jun 15, 2021) with no new permit activity recorded in 5.4 yr.
- New home (Issued)0.45 mi S
Active in "Issued" for 8.2 yr (first record Aug 17, 2018) with no new permit activity recorded in 8.2 yr.
- 2 new homes (Issued)0.48 mi S
Active in "Issued" for 8.4 yr (first record Jun 20, 2018) with no new permit activity recorded in 8.4 yr.
Entity-resolved builders & contractors in ½ mile: Sonomarin Solar_inc (2 on parcel, 2 in ½ mi · Electrical / panel); Renewal By Andersen (1 on parcel, 1 in ½ mi · Windows / doors / siding); Tech Air (1 on parcel, 1 in ½ mi · HVAC / heat pump); David Marshall Construction (1 on parcel, 1 in ½ mi · Remodel / interior alteration); Warner Custom Homes (1 on parcel, 1 in ½ mi · General repair).
Permit & Project History on This Parcel (6 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B35554 | Electrical / panel | Issued | Iss. Sep 27, 2023 | $3,500 | 200A MAIN SERVICE PANEL UPGRADE — Service Upgrade |
| 174392 | General repair | Issued | Iss. Jun 29, 2023 | $4,000 | Voluntary Seismic Retrofit In Accordance With Plan Set A |
| B33079 | Solar / battery storage | Issued | Iss. Mar 21, 2023 | $30,960 | PHOTOVOLTAIC - RESIDENTIAL TILT ROOF MOUNT, GRID TIED. 200A MAIN SERVICE PANEL UPGRADE |
| B29455 | HVAC / heat pump | Issued | Iss. Apr 19, 2022 | $12,000 | Replace gas furnace with all electric heat pump system — Mechanical Appliance, Replace Mechanical Appliance |
| 150608 | Remodel / interior alteration | Issued |