100 A John St
Tomales 94971 · Tomales · Unincorporated Marin · Coordinates: 38.24662, -122.90223
Executive Verdict · Public-Records Synthesis
Zoned C-ARP-10 in Unincorporated Marin and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,522,000 ($1,339,000–$1,705,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$289,025 contributory est.)
Public building records show issued construction/renovation work on this parcel (5 total permits, latest May 12, 2026).
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
Solar / battery storage (174766): Issued after 2 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 4 slow or stalled nearby projects within ½ mile
Closest lead: New commercial building at 599 Dillon Beach Rd (0.44 mi W, 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:
- 218,366 sq ft (5.01 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 100A JOHN ST; 100 JOHN ST
Zoning & Land Use
C-ARP-10 — Agriculture Residential Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned C-ARP-10 (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 C-ARP-10 (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned C-ARP-10 (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 06041C0085E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,339,000 – $1,705,000 · Status: Off market
HUD Small Area FMR (ZIP 94971) · FY 2026
Studio $2,400 · 1BR $2,870 · 2BR $3,480 · 3BR $4,450 · 4BR $4,610
Developments Deserving Closer Investigation & Active Area Builders
- Solar / battery storage (174766) (Issued)On this parcel
Issued after 2 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
- Remodel / interior alteration (90062) (Applied)On this parcel
Pending in review for 4.4 yr (19.2× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
- New commercial building at 599 Dillon Beach Rd (Issued)0.44 mi W
Active in "Issued" for 8.1 yr (first record Oct 9, 2018) with no new permit activity recorded in 7.7 yr. High-impact scale ($6,662,000 declared valuation across 2 permits).
- New home at 15 Carrie St (Issued)0.27 mi W
Active in "Issued" for 5.2 yr (first record Sep 17, 2021) with no new permit activity recorded in 2.6 yr.
Entity-resolved builders & contractors in ½ mile: Solarcraft Services (2 on parcel, 2 in ½ mi · HVAC / heat pump); Cohan Structures (1 on parcel, 1 in ½ mi · Accessory dwelling unit (new or conversion)); The R And D Lab (1 on parcel, 1 in ½ mi · Solar / battery storage); Owner Builder (11 in ½ mi · New single-family home); Ef Brett And (3 in ½ mi · Demolition).
Permit & Project History on This Parcel (5 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 181658 | Accessory dwelling unit (new or conversion) | Issued | Iss. May 12, 2026 | $279,650 | New Detached A D U; Deck |
| B44866 | Solar / battery storage | Issued | Iss. Nov 20, 2025 | $30,520 | Install 27 kWh energy storage system (ESS). Install EV charger |
| B44772 | HVAC / heat pump | Issued | Iss. Nov 13, 2025 | $20,578 | Installation of a Mitsubishi PUZ-AK36NL 36K BTU 3 Ton Outdoor Heat Pump and a Mitsubishi PVA-AA36NL 36K BTU 3 Ton Air Ha… |
| 174766 | Solar / battery storage | Issued | Iss. Aug 16, 2023 | $58,626 |