54 Dolphin Isle
Novato 94949 · Bel Marin Keys · Unincorporated Marin · Coordinates: 38.07619, -122.51606
Executive Verdict · Public-Records Synthesis
Zoned Undesignated in Unincorporated Marin and mapped FEMA AE flood due diligence; benchmark value $1,350,000 ($1,188,000–$1,512,000).
Upsides & Opportunities
- ✓ 2 documented municipal building permits on file
On-parcel permit history is indexed through Oct 9, 2024, 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
- ! FEMA Special Flood Hazard Area (AE, about 42% of the lot of lot)
Zone AE: 1% annual chance flood (Special Flood Hazard Area) overlaps this parcel. Expect mandatory flood insurance for federally backed loans and floodplain elevation/mitigation rules for new units or SB 9 applications.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! 3 slow or stalled nearby projects within ½ mile
Closest lead: Demolition at 18 Dolphin Isle (480 ft 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)
- ! Year 1 Prop 13 tax reset (~$15,975/yr at $1,350,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,331/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:
- 9,714 sq ft (0.22 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 54 DOLPHIN ISLE
Zoning & Land Use
Undesignated — Undesignated (Novato)
RSP-1.6-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned Undesignated (other): ADUs are allowed if the zone allows a home, which depends on the zone's rules. The parcel point also falls in RSP-1.6-BFC.
- SB 9: two homes on the lotCan't tell
Zoned Undesignated (other): we can't tell whether it counts as a single-family zone for SB 9. Undesignated. The parcel point also falls in RSP-1.6-BFC.
- SB 9: split into two lotsCan't tell
Zoned Undesignated (other): we can't tell whether it counts as a single-family zone for SB 9. Undesignated. The parcel point also falls in RSP-1.6-BFC.
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 AE: 1% annual chance flood (Special Flood Hazard Area) (about 42% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 58% of the lot) · FIRM panel 06041C0284E, 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: $1,188,000 – $1,512,000 · Status: Off market
HUD Small Area FMR (ZIP 94949) · FY 2026
Studio $2,360 · 1BR $2,830 · 2BR $3,430 · 3BR $4,380 · 4BR $4,540
Developments Deserving Closer Investigation & Active Area Builders
- Demolition at 18 Dolphin Isle (Issued)480 ft NW
Active in "Issued" for 11.6 yr (first record Mar 25, 2015) with no new permit activity recorded in 11.6 yr.
- Demolition at 1051 Bel Marin Keys Blvd (Issued)0.42 mi N
Active in "Issued" for 8.5 yr (first record May 21, 2018) with no new permit activity recorded in 8.4 yr.
- Accessory dwelling unit at 1108 Bel Marin Keys Blvd (aka 1110) (Issued)0.47 mi NE
Active in "Issued" for 4.6 yr (first record Mar 23, 2022) with no new permit activity recorded in 4.4 yr.
Entity-resolved builders & contractors in ½ mile: Martinez Roofing (1 on parcel, 1 in ½ mi · Roof replacement); One Hour Heating And Air (1 on parcel, 1 in ½ mi · HVAC / heat pump); Owner Builder (22 in ½ mi · Remodel / interior alteration); Owner (10 in ½ mi · Remodel / interior alteration); Natal Modica Construction (3 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (2 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B39751 | Roof replacement | Issued | Iss. Oct 9, 2024 | $12,750 | tear off existing roof and reroof with composition shingles — ReRoofing |
| 142509 | HVAC / heat pump | Issued | Iss. May 6, 2014 | $7,920 | Repl Furnace & A/C |