150 Keith Way
Inverness 94937 · Inverness · Unincorporated Marin · Coordinates: 38.10442, -122.86401
Executive Verdict · Public-Records Synthesis
Zoned C-RSP-0.5 in Unincorporated Marin and mapped CAL FIRE very high fire hazard severity zone (state responsibility area) / Alquist-Priolo fault due diligence; benchmark value $1,641,000 ($1,444,000–$1,838,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$52,240 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Jul 22, 2025).
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 Very High 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)
- ! Alquist-Priolo Earthquake Fault Zone (all of the lot of lot)
Intersects a State-mapped surface fault rupture zone. Adding habitable structures or subdividing typically requires a site-specific geologic fault investigation.
Source: California Geological Survey Alquist-Priolo Zones
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home at 115 Kehoe Way (0.27 mi NW, applied). Inspect timeline history before assuming near-term completion.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) · HCD APR (½-mile radius)
Parcel & Assessor
- Lot size:
- 102,453 sq ft (2.35 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 150 KEITH WAY
Zoning & Land Use
C-RSP-0.5 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUPossible, with conditions
Zoned C-RSP-0.5 (single-family residential): state law allows ADUs where homes are allowed. Very High Fire Hazard Severity Zone covers all of the lot: cities may limit ADUs here for fire safety and evacuation.
- SB 9: two homes on the lotPossible, with conditions
Zoned C-RSP-0.5, a single-family residential zone. Very High Fire Hazard Severity Zone (State responsibility area) covers all of the lot: SB 9 requires the project to meet the fire hazard mitigation standards. Alquist-Priolo Earthquake Fault Zone covers all of the lot: the project must meet the seismic building standards, and a fault study is usually required.
- SB 9: split into two lotsPossible, with conditions
Zoned C-RSP-0.5, a single-family residential zone. The lot is 102,453 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. Very High Fire Hazard Severity Zone (State responsibility area) covers all of the lot: SB 9 requires the project to meet the fire hazard mitigation standards. Alquist-Priolo Earthquake Fault Zone covers all of the lot: the project must meet the seismic building standards, and a fault study is usually required.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Very 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 06041C0230E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Alquist-Priolo Earthquake Fault Zone (Inverness quadrangle) (all of the lot)
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,444,000 – $1,838,000 · Status: Off market
HUD Small Area FMR (ZIP 94937) · FY 2026
Studio $2,400 · 1BR $2,870 · 2BR $3,480 · 3BR $4,450 · 4BR $4,610
Developments Deserving Closer Investigation & Active Area Builders
- New home at 115 Kehoe Way (Applied)0.27 mi NW
In "Applied" for 10.8 yr (since Feb 8, 2016), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, $908,000 declared valuation across 2 permits).
- New home at 60 Trossach Way (Applied)0.47 mi S
In "Applied" for 5.9 yr (since Dec 15, 2020), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, $1,400,000 declared valuation across 1 permit).
- New home at 179 Keith Way (Issued)400 ft SW
Active in "Issued" for 17 mo (first record Jun 9, 2025) with no new permit activity recorded in 10 mo. High-impact scale (1 housing unit, $1,160,000 declared valuation across 1 permit).
- New home at 120 Kehoe Way (Issued)0.2 mi NW
Active in "Issued" for 13.2 yr (first record Sep 12, 2013) with no new permit activity recorded in 11.8 yr.
Entity-resolved builders & contractors in ½ mile: Stryker Builders (2 on parcel, 7 in ½ mi · New garage / accessory structure); Solarcraft Services (2 on parcel, 2 in ½ mi · Solar / battery storage); Owner Builder (9 in ½ mi · Remodel / interior alteration); Arrow Construction And Remodeling (2 in ½ mi · New single-family home); Oakwood Construction (2 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (4 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B43182 | Solar / battery storage | Issued | Iss. Jul 22, 2025 | $62,300 | NEW FLUSH MOUNTED PV SYSTEM WITH BATTERY STORAGE, GRID TIED MICROINVERTERS, TO EXISTING MAIN SERVICE PANEL. |
| 176921 | General repair | Issued | Iss. Jun 24, 2024 | $19,000 | Foundation & Retaining Wall For 5000 Gal. Plastic Water Storage Tank |
| 176920 | Pool / spa | Issued | Iss. Jun 24, 2024 | $22,000 | Hot Tub, Retaining Walls, Sauna |
| B38423 | Solar / battery storage | Issued | Iss. Jun 18, 2024 | $58,100 | (N) FLUSH MOUNTED 5.74 kW PV SYSTEM WITH (N) 27.0 kWh BATTERY STORAGE, GRID TIED MICROINVERTERS |