99 Del Oro Lagoon
Novato 94949 · Bel Marin Keys · Unincorporated Marin · Coordinates: 38.07905, -122.51623
Executive Verdict · Public-Records Synthesis
Zoned Undesignated in Unincorporated Marin and mapped FEMA AE flood due diligence; benchmark value $1,494,000 ($1,315,000–$1,673,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$144,000 contributory est.)
Public building records show issued construction/renovation work on this parcel (2 total permits, latest Sep 16, 2025).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (AE, about 36% 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)
- ! Delayed or open permit activity on this parcel
Remodel / interior alteration (178922): Issued after 9 mo (3.3× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
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: Demolition at 54 Calypso Shores (0.44 mi NE, applied). 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 (~$17,631/yr at $1,494,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,469/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:
- 99 DEL ORO LAGOON
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 36% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 64% 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: $1,315,000 – $1,673,000 · 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
- Remodel / interior alteration (178922) (Issued)On this parcel
Issued after 9 mo (3.3× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
- Demolition at 54 Calypso Shores (Applied)0.44 mi NE
In "Applied" for 4.5 yr (since May 26, 2022), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
- Demolition at 18 Dolphin Isle (Issued)0.12 mi S
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)0.22 mi N
Active in "Issued" for 8.5 yr (first record May 21, 2018) with no new permit activity recorded in 8.4 yr.
Entity-resolved builders & contractors in ½ mile: Rafael Home Services (1 on parcel, 2 in ½ mi · Remodel / interior alteration); Bellows Plumbing Heating And Air (1 on parcel, 1 in ½ mi · HVAC / heat pump); Owner Builder (27 in ½ mi · Remodel / interior alteration); Owner (16 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 |
|---|---|---|---|---|---|
| B43907 | HVAC / heat pump | Issued | Iss. Sep 16, 2025 | $15,000 | Replace existing furnace and AC with ducted air handler and heat pump. Air handler in garage, heat pump at existing AC l… |
| 178922 | Remodel / interior alteration | Issued | Iss. Mar 28, 2025 | $400,000 | Addition & Remodel; Enlarg Upper & Lower Decks; (N) Outdoor Shade Structure; Windows & Doors; Reroof; Siding |