1000 Bayhills Dr
San Rafael 94903 · Santa Venetia · Unincorporated Marin · Coordinates: 38.00435, -122.50771
Executive Verdict · Public-Records Synthesis
Zoned RMP-0.1 in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,266,000 ($1,114,000–$1,418,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RMP-0.1 allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$98,671 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Oct 5, 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)
- ! Delayed or open permit activity on this parcel
HVAC / heat pump (B23540): Issued after 2 mo — slower than 90% of hvac / heat pump permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,946).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 3 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 27 Sunny Oaks Dr (aka 29) (0.4 mi N, 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:
- 496,497 sq ft (11.40 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 1000 BAYHILLS DR
Zoning & Land Use
RMP-0.1 — Residential Multiple Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RMP-0.1 (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-0.1 (multifamily residential), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RMP-0.1 (multifamily residential), not a single-family residential zone.
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 06041C0294E, 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: $1,114,000 – $1,418,000 · 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
- HVAC / heat pump (B23540) (Issued)On this parcel
Issued after 2 mo — slower than 90% of hvac / heat pump permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,946).
- Accessory dwelling unit at 27 Sunny Oaks Dr (aka 29) (Applied)0.4 mi N
In "Applied" for 3.5 yr (since May 2, 2023), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- Demolition at 161 Granlee Rd (Issued)0.33 mi NW
Active in "Issued" for 7.5 yr (first record May 16, 2019) with no new permit activity recorded in 7.4 yr.
- Demolition at 0 Sidney Ct (a P N 180-252-07) (Applied)0.5 mi NW
In "Applied" for 7 mo (since Apr 16, 2026), exceeding the 55d median and 106d 75th percentile for demolition permits in Unincorporated Marin (n=130).
Entity-resolved builders & contractors in ½ mile: Owner Builder (1 on parcel, 6 in ½ mi · Demolition); Gold Rush Energy Solutions (2 on parcel, 2 in ½ mi · Other); Semper Solaris (2 on parcel, 2 in ½ mi · Electrical / panel); Mccauleys And Father Const (1 on parcel, 1 in ½ mi · Other); John Owens Services (1 on parcel, 1 in ½ mi · HVAC / heat pump).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 175133 | Remodel / interior alteration | Issued | Iss. Oct 5, 2023 | $185,000 | Remodel Entire Main Flr, Vault Ceiling In Kitchen & Living Rm |
| B35473 | Other | Issued | Iss. Sep 20, 2023 | $26,750 | 2 Tesla Powerwalls Storage Batteries |
| B28339 | Other | Issued | Iss. Jan 13, 2022 | $26,750 | 2 Tesla Powerwalls Storage Batteries |
| B23540 | HVAC / heat pump | Issued | Iss. Nov 24, 2020 | $27,969 | Install 2 AC units and 1 high-efficiency furnace with variable speed. — Mechanical Appliance |
| 165921 | Electrical / panel | Issued | Iss. Oct 8, 2020 |