5231 Red Hill Rd
Petaluma 94952 · Unincorporated Marin · Coordinates: 38.18453, -122.66594
Executive Verdict · Public-Records Synthesis
Zoned A60 in Unincorporated Marin and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence.
Upsides & Opportunities
- ✓ 9 documented municipal building permits on file
On-parcel permit history is indexed through Jun 2, 2025, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
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
New home at 5231 Red Hill Rd: Active in "Issued" for 11.9 yr (first record Dec 23, 2014) with no new permit activity recorded in 8.2 yr.
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
Parcel & Assessor
- Lot size:
- 284,795 sq ft (6.54 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 5231 RED HILL RD; 5233 RED HILL RD
Zoning & Land Use
A60 — Agriculture and Conservation (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned A60 (agricultural): ADUs are allowed if the zone allows a home, which depends on the zone's rules.
- SB 9: two homes on the lotUnlikely
Zoned A60 (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned A60 (agricultural), 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 06041C0150D, effective May 4, 2009
- 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 94952) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $4,010 · 4BR $4,280
Nearby Activity (½ mile radius, since November 2024)
0 active or recent development projects and 2 total building permits recorded within ½ mile.
- Building systems2 permits
Developments Deserving Closer Investigation & Active Area Builders
- New home at 5231 Red Hill Rd (Issued)On this parcel
Active in "Issued" for 11.9 yr (first record Dec 23, 2014) with no new permit activity recorded in 8.2 yr.
- General repair (159557) (Issued)On this parcel
Issued after 9 mo (3.2× the 83d median) — above the 75th percentile for general repair permits in Unincorporated Marin (median 83d, 75th pct 181d, n=693).
- General repair (159556) (Issued)On this parcel
Issued after 9 mo (3.2× the 83d median) — above the 75th percentile for general repair permits in Unincorporated Marin (median 83d, 75th pct 181d, n=693).
- General repair (159555) (Issued)On this parcel
Issued after 9 mo (3.2× the 83d median) — above the 75th percentile for general repair permits in Unincorporated Marin (median 83d, 75th pct 181d, n=693).
Entity-resolved builders & contractors in ½ mile: Owner Builder (4 on parcel, 4 in ½ mi · General repair); Sun First (2 on parcel, 2 in ½ mi · Solar / battery storage); Morita Construction (1 on parcel, 1 in ½ mi · New single-family home); American Solar (1 on parcel, 1 in ½ mi · Solar / battery storage); Adams Refrigeration Service A California Corpo (1 on parcel, 1 in ½ mi · HVAC / heat pump).
Permit & Project History on This Parcel (9 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B42601 | HVAC / heat pump | Issued | Iss. Jun 2, 2025 | $6,000 | replace ductless heatpump. install mitsubshi unit — Replace Mechanical Appliance |
| 166070 | Solar / battery storage | Issued | Iss. Oct 28, 2020 | $26,000 | Battery Back Up |
| 166069 | Solar / battery storage | Issued | Iss. Oct 28, 2020 | $38,831 | Pv Solar 8.60kw - F.T. |
| 159557 | General repair | Issued | Iss. Sep 12, 2018 | $30,000 | Retaining Wall - Lower |