51 Beach Dr
San Rafael 94901 · Bayside Acres · Unincorporated Marin · Coordinates: 37.97492, -122.47667
Executive Verdict · Public-Records Synthesis
Zoned RSP-7.26-BFC in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $1,409,000 ($1,240,000–$1,578,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-7.26-BFC supports ministerial ADU/JADU review plus SB 9 two-unit residential development on a 2,134 sq ft lot. Local precedent is active with 2 ADU permits within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ 1 documented municipal building permit on file
On-parcel permit history is indexed through Jan 19, 2025, 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: 14 new homes (0.43 mi W, entitled). 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 (~$16,654/yr at $1,409,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,388/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:
- 2,134 sq ft (0.05 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 51 BEACH DR
Zoning & Land Use
RSP-7.26-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-7.26-BFC (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-7.26-BFC, a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RSP-7.26-BFC, a single-family residential zone. The lot is 2,134 sq ft by the assessor; a split needs at least 2,400 sq ft (two lots of 1,200 sq ft or more).
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Not in a State-mapped fire hazard severity zone
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0476E, 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: $1,240,000 – $1,578,000 · Status: Off market
HUD Small Area FMR (ZIP 94901) · FY 2026
Studio $2,150 · 1BR $2,580 · 2BR $3,120 · 3BR $3,990 · 4BR $4,130
Developments Deserving Closer Investigation & Active Area Builders
- 14 new homes (Entitled)0.43 mi W
In "Entitled" for 11 mo (since Dec 9, 2025), exceeding the 292d median and 313d 90th percentile for new multifamily / condos / mixed-use permits in Unincorporated Marin (n=21). High-impact scale (14 housing units, 1 deed-restricted affordable across 0 permits).
- New home at 22 Beach Dr (Issued)0.12 mi W
Active in "Issued" for 3.4 yr (first record Jun 27, 2023) with no new permit activity recorded in 2.8 yr. High-impact scale (1 housing unit, $1,200,000 declared valuation across 1 permit).
- Accessory dwelling unit at 771 Pt San Pedro Rd (Applied)0.15 mi NW
In "Applied" for 4 yr (since Nov 15, 2022), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home at 726 Pt San Pedro Rd (Issued)0.17 mi W
Active in "Issued" for 3.6 yr (first record Apr 14, 2023) with no new permit activity recorded in 7 mo. High-impact scale (1 housing unit, $2,000,000 declared valuation across 1 permit).
Entity-resolved builders & contractors in ½ mile: Sonoma Marin Electric (1 on parcel, 1 in ½ mi · Plumbing / water heater / sewer); Owner Builder (8 in ½ mi · Remodel / interior alteration); Owner (6 in ½ mi · Remodel / interior alteration); G Family (2 in ½ mi · New single-family home); Levine Design And Construction (2 in ½ mi · Accessory dwelling unit (new or conversion)).
Permit & Project History on This Parcel (1 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B40915 | Plumbing / water heater / sewer | Issued | Iss. Jan 19, 2025 | $10,000 | Furnish and install new electrical infrastructure for the Bayside Acres Phase 2B sewer project — New Circuits / Outlets |