100 Bay Rd
Tomales 94971 · Unincorporated Marin · Coordinates: 38.23975, -122.90206
Executive Verdict · Public-Records Synthesis
Zoned C-ARP-20 in Unincorporated Marin and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,108,000 ($942,000–$1,274,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$15,120 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Nov 8, 2022).
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 commercial building at 100 Bay Rd: Active in "Issued" for 4.4 yr (first record Jun 10, 2022) with no new permit activity recorded in 4.3 yr.
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: New home at 3765 Tomales-petaluma Rd (0.45 mi E, 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:
- 674,527 sq ft (15.49 ac)
- Assessor use:
- Agricultural - Improved
- Addresses on lot:
- 100 BAY RD
Zoning & Land Use
C-ARP-20 — Agriculture Residential Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned C-ARP-20 (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-20 (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned C-ARP-20 (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: $942,000 – $1,274,000 · 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
Nearby Activity (½ mile radius, since November 2024)
1 active or recent development project (1 housing units across completed, permitted, and pipeline stages) and 11 total building permits recorded within ½ mile.
- Adds housing (ADU)
Developments Deserving Closer Investigation & Active Area Builders
- New commercial building at 100 Bay Rd (Issued)On this parcel
Active in "Issued" for 4.4 yr (first record Jun 10, 2022) with no new permit activity recorded in 4.3 yr.
- New home at 100 Bay Rd (Issued)On this parcel
Active in "Issued" for 10.3 yr (first record Jul 14, 2016) with no new permit activity recorded in 10.2 yr.
- New home at 3765 Tomales-petaluma Rd (Issued)0.45 mi E
Active in "Issued" for 9.2 yr (first record Aug 17, 2017) with no new permit activity recorded in 8.8 yr.
- New home at 21 Church St (Issued)0.47 mi NW
Active in "Issued" for 4.7 yr (first record Mar 11, 2022) with no new permit activity recorded in 3.2 yr.
Entity-resolved builders & contractors in ½ mile: Owner Builder (3 on parcel, 8 in ½ mi · New single-family home); Ilum Solar (1 on parcel, 1 in ½ mi · Solar / battery storage); Cohan Structures (1 in ½ mi · Accessory dwelling unit (new or conversion)).
Permit & Project History on This Parcel (4 permits, 2 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B31705 | Solar / battery storage | Issued | Iss. Nov 8, 2022 | $61,060 | 10.650Kw roof mount solar system |
| 172089 | New commercial / non-residential building | Issued | Iss. Aug 8, 2022 | $27,500 | New Barn - Ag Exempt |
| 153024 | New single-family home | Issued | Iss. Aug 22, 2016 | $175,000 | S F D***Expired T.D. 8/30/16 |
| 152768 | Electrical / panel |