300 Bothin Rd
Fairfax 94930 · Unincorporated Fairfax · Unincorporated Marin · Coordinates: 37.99477, -122.60712
Executive Verdict · Public-Records Synthesis
Zoned RSP-0.05 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,290,000 ($1,135,000–$1,445,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-0.05 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 769,008 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$36,174 contributory est.)
Public building records show issued construction/renovation work on this parcel (11 total permits, latest Oct 7, 2024).
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)
- ! 1 slow or stalled nearby project within ½ mile
Closest lead: 54 new homes (0.48 mi NE, 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)
- ! Year 1 Prop 13 tax reset (~$15,285/yr at $1,290,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,274/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Parcel & Assessor
- Lot size:
- 769,008 sq ft (17.65 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 300 BOTHIN RD
Zoning & Land Use
RSP-0.05 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-0.05 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-0.05, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-0.05, a single-family residential zone. The lot is 769,008 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
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 06041C0451E, effective March 17, 2014
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,135,000 – $1,445,000 · Status: Off market
HUD Small Area FMR (ZIP 94930) · FY 2026
Studio $2,230 · 1BR $2,680 · 2BR $3,240 · 3BR $4,140 · 4BR $4,290
Developments Deserving Closer Investigation & Active Area Builders
- 54 new homes (Issued)0.48 mi NE
Active in "Issued" for 8 yr (first record Nov 26, 2018) with no new permit activity recorded in 8 yr. High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
- Victory Village Senior Housing (Finaled / completed)0.48 mi NE
High-impact scale (54 housing units, 54 deed-restricted affordable across 0 permits).
Entity-resolved builders & contractors in ½ mile: Tesla Energy (3 on parcel, 3 in ½ mi · Solar / battery storage); Ernest Ongaro And Sons (3 on parcel, 3 in ½ mi · Electrical / panel); Sonomarin Solar_inc (1 on parcel, 1 in ½ mi · Solar / battery storage); Westward Builders (1 on parcel, 1 in ½ mi · General repair); Float Glass And Mirror (1 on parcel, 1 in ½ mi · Electrical / panel).
Permit & Project History on This Parcel (11 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 177784 | General repair | Issued | Iss. Oct 7, 2024 | $50,000 | Slope & Roadway Remediation For Roadway Edge Failure |
| B31458 | Solar / battery storage | Issued | Iss. Oct 19, 2022 | $67,000 | PHOTOVOLTAIC - RESIDENTIAL FLUSH AND TILT ROOF MOUNT, GRID-TIED. AC COUPLED BATTERY INSTALLATION WITH (2) ENPHASE 10kWH … |
| 163772 | Plumbing / water heater / sewer | Issued | Iss. Dec 30, 2019 | $2,000 | New Water Line |
| 163493 | Roof replacement | Issued | Iss. Dec 10, 2019 | $13,920 | Reroof |
| 163492 | Solar / battery storage | Issued | Iss. Dec 10, 2019 |