23 Westgate Dr
San Rafael 94903 · Lucas Valley · Unincorporated Marin · Coordinates: 38.04058, -122.59805
Executive Verdict · Public-Records Synthesis
Zoned RMP-0.345 in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,593,000 ($1,402,000–$1,784,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RMP-0.345 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$89,825 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Aug 25, 2022).
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 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)
- ! Delayed or open permit activity on this parcel
Pool / spa (141614): Issued after 20.1 yr (53.9× the 136d median) — slower than 90% of pool / spa permits in Unincorporated Marin (median 136d, 90th pct 393d, n=162).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 1 slow or stalled nearby project within ½ mile
Closest lead: Accessory dwelling unit at 71 Creekside Dr (0.21 mi SE, 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:
- 40,032 sq ft (0.92 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 23 WESTGATE DR
Zoning & Land Use
RMP-0.345 — Residential Multiple Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RMP-0.345 (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs.
- SB 9: two homes on the lotUnlikely
Zoned RMP-0.345 (multifamily residential), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RMP-0.345 (multifamily residential), not a single-family residential zone.
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 06041C0286D, effective May 4, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,402,000 – $1,784,000 · Status: Off market
HUD Small Area FMR (ZIP 94903) · FY 2026
Studio $2,880 · 1BR $3,450 · 2BR $4,180 · 3BR $5,340 · 4BR $5,530
Developments Deserving Closer Investigation & Active Area Builders
- Pool / spa (141614) (Issued)On this parcel
Issued after 20.1 yr (53.9× the 136d median) — slower than 90% of pool / spa permits in Unincorporated Marin (median 136d, 90th pct 393d, n=162).
- Accessory dwelling unit at 71 Creekside Dr (Applied)0.21 mi SE
In "Applied" for 5.3 yr (since Aug 12, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Entity-resolved builders & contractors in ½ mile: Riptide Construction (1 on parcel, 1 in ½ mi · Pool / spa); J And J Custom Builders (1 on parcel, 1 in ½ mi · Remodel / interior alteration); Tesla Energy Operations (1 on parcel, 1 in ½ mi · Solar / battery storage); Charrette Assoc (1 on parcel, 1 in ½ mi · Pool / spa); Owner Builder (5 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 |
|---|---|---|---|---|---|
| 172216 | Pool / spa | Issued | Iss. Aug 25, 2022 | $200,000 | Pool & Spa; Retaining Walls; Outdoor Kitchen |
| B28788 | Solar / battery storage | Issued | Iss. Feb 18, 2022 | $32,870 | Install roof mount solar panels at 12.75 kW and batteries. |
| 167482 | Remodel / interior alteration | Issued | Iss. Mar 22, 2021 | $90,000 | 4 Bath Rmdl - Express |
| 141614 | Pool / spa | Issued | Iss. Feb 18, 2014 | $6,000 | Inground Spa- Exp. Ltr Sent 7-16-97 Site Ck 7-17-97-See Notes Under Planning |