145 Tamal Rd
Forest Knolls 94933 · Forest Knolls · Unincorporated Marin · Coordinates: 38.01799, -122.69376
Executive Verdict · Public-Records Synthesis
Zoned RA-B4-SGV in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $887,000 ($781,000–$993,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RA-B4-SGV allows residential use qualifying for ministerial ADU review under state law (1 ADU permit permitted within ¼ mile in 36 months).
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ 7 documented municipal building permits on file
On-parcel permit history is indexed through Jul 28, 2026, 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 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
Commercial tenant improvement (164551): Issued after 9 mo (1.9× the 148d median) — above the 75th percentile for commercial tenant improvement permits in Unincorporated Marin (median 148d, 75th pct 233d, n=81).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 5 slow or stalled nearby projects within ½ mile
Closest lead: New home at 42 Arroyo Rd (0.13 mi SE, 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)
Parcel & Assessor
- Lot size:
- 487,349 sq ft (11.19 ac)
- Assessor use:
- Commercial - Improved
- Addresses on lot:
- 145 TAMAL RD
Zoning & Land Use
RA-B4-SGV — Residential Agriculture (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RA-B4-SGV (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotCan't tell
Zoned RA-B4-SGV (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
- SB 9: split into two lotsCan't tell
Zoned RA-B4-SGV (single-family residential): we can't tell whether it counts as a single-family zone for SB 9. Residential agriculture, estate and restricted: large-lot residential; confirm SB 9 with the county.
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 06041C0275D, 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: $781,000 – $993,000 · Status: Off market
HUD Small Area FMR (ZIP 94933) · FY 2026
Studio $2,870 · 1BR $3,440 · 2BR $4,160 · 3BR $5,310 · 4BR $5,510
Developments Deserving Closer Investigation & Active Area Builders
- Commercial tenant improvement (164551) (Issued)On this parcel
Issued after 9 mo (1.9× the 148d median) — above the 75th percentile for commercial tenant improvement permits in Unincorporated Marin (median 148d, 75th pct 233d, n=81).
- New home at 42 Arroyo Rd (Issued)0.13 mi SE
Active in "Issued" for 12.3 yr (first record Aug 11, 2014) with no new permit activity recorded in 11.8 yr.
- Demolition at 6956 Sir Francis Drake Blvd (Issued)0.21 mi SE
Active in "Issued" for 2.8 yr (first record Jan 10, 2024) with no new permit activity recorded in 2.7 yr.
- New home at 94 Tamal Rd (Issued)0.24 mi NE
Active in "Issued" for 11.7 yr (first record Feb 26, 2015) with no new permit activity recorded in 8.7 yr.
Entity-resolved builders & contractors in ½ mile: Brownco Construction And Dev (2 on parcel, 2 in ½ mi · Commercial tenant improvement); Marin County Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Crandall Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Brownco Construction And Development (1 on parcel, 1 in ½ mi · Windows / doors / siding); Downing Heating And Air Condition (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 |
|---|---|---|---|---|---|
| B47655 | Roof replacement | Issued | Iss. Jul 28, 2026 | $65,000 | ReRoofing; With Electronic Inspection |
| B26807 | Plumbing / water heater / sewer | Issued | Iss. Aug 27, 2021 | $3,000 | 50 GALLON WATER HEATER CHANGE OUT. — Replace Plumbing Fixtures(s) |
| B22416 | Windows / doors / siding | Issued | Iss. Apr 2, 2020 | $7,500 | Siding — Siding Replacement |
| 164551 | Commercial tenant improvement | Issued | Iss. Apr 2, 2020 | $150,000 | Rmdl Treatment Facility T.D. 7/23/19 See Also- Retaining Wall Permit (84838) |
| 164550 | General repair | Issued | Iss. Apr 2, 2020 |