57 Bridge Rd
Ross 94957 · Ross · Coordinates: 37.95941, -122.55842
Executive Verdict · Public-Records Synthesis
Zoned R-1_B-10 in Ross with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (local responsibility area) due diligence; benchmark value $4,724,000 ($4,015,000–$5,433,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R-1_B-10 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 17,729 sq ft lot.
Source: Ross zoning · CA Gov. Code 66314 & 65852.21
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 (Local 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 Mar 24, 2025)
- ! Delayed or open permit activity on this parcel
57 Bridge: Active in "Issued" for 2.8 yr (first record Jan 23, 2024) with no new permit activity recorded in 2.8 yr.
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: 147 Lagunitas (0.16 mi NW, 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:
- 17,729 sq ft (0.41 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 57 BRIDGE RD; 57 BRIDGE RD UNIT A
Zoning & Land Use
R-1_B-10 — SINGLE FAMILY RESIDENTIAL (Ross)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-1_B-10 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-1_B-10, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-1_B-10, a single-family residential zone. The lot is 17,729 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
- Moderate Fire Hazard Severity Zone (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0458F, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $4,015,000 – $5,433,000 · Status: Off market
HUD Small Area FMR (ZIP 94957) · FY 2026
Studio $3,110 · 1BR $3,730 · 2BR $4,510 · 3BR $5,760 · 4BR $5,970
Nearby Activity (½ mile radius, since November 2024)
16 active or recent development projects (15 housing units across completed, permitted, and pipeline stages) and 161 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- 57 Bridge (Issued)On this parcel
Active in "Issued" for 2.8 yr (first record Jan 23, 2024) with no new permit activity recorded in 2.8 yr.
- 147 Lagunitas (Issued)0.16 mi NW
Active in "Issued" for 3.7 yr (first record Feb 28, 2023) with no new permit activity recorded in 3.7 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
- New home at 75 Rock Rd (Issued)0.33 mi S
Active in "Issued" for 2.2 yr (first record Aug 27, 2024) with no new permit activity recorded in 18 mo. High-impact scale (1 housing unit, $936,400 declared valuation across 1 permit).
- Accessory dwelling unit at 55 Redwood Dr A D U 55 A (Issued)0.26 mi SE
Active in "Issued" for 17 mo (first record Jun 12, 2025) with no new permit activity recorded in 10 mo. High-impact scale (1 housing unit, $895,000 declared valuation across 1 permit).
Permit & Project History on This Parcel (0 permits, 2 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 2 entries (report years 2024, 2025).