3550 Paradise Dr
Tiburon 94920 · Unincorporated Tiburon · Unincorporated Marin · Coordinates: 37.89483, -122.45903
Executive Verdict · Public-Records Synthesis
Zoned RSP-1-BFC in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA AE flood / CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $3,329,000 ($2,930,000–$3,728,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RSP-1-BFC allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$5,440 contributory est.)
Public building records show issued construction/renovation work on this parcel (1 total permit, latest Feb 12, 2018).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (AE, about 55% 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)
- ! CAL FIRE Moderate Fire Hazard Severity Zone (State Responsibility Area) (about 55% 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)
- ! 4 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 21 Teaberry Ln (0.44 mi SE, 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 (~$38,734/yr at $3,329,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$3,228/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:
- 86,989 sq ft (2.00 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 3550 PARADISE DR
Zoning & Land Use
RSP-1-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-1-BFC (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned RSP-1-BFC, a single-family residential zone. FEMA Special Flood Hazard Area (Zone AE) covers about 55% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
- SB 9: split into two lotsPossible, with conditions
Zoned RSP-1-BFC, a single-family residential zone. The lot is 86,989 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. FEMA Special Flood Hazard Area (Zone AE) covers about 55% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (State Responsibility Area) (about 55% of the lot, map Apr 1, 2024); Moderate Fire Hazard Severity Zone (Local Responsibility Area) (about 23% of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone AE: 1% annual chance flood (Special Flood Hazard Area) (about 55% of the lot); Zone X: minimal flood hazard (about 45% of the lot) · FIRM panel 06041C0489E, 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: $2,930,000 – $3,728,000 · Status: Off market
HUD Small Area FMR (ZIP 94920) · FY 2026
Studio $2,820 · 1BR $3,380 · 2BR $4,100 · 3BR $5,230 · 4BR $5,420
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 21 Teaberry Ln (Applied)0.44 mi SE
In "Applied" for 4.5 yr (since May 5, 2022), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home (Issued)0.45 mi SW
Active in "Issued" for 2 yr (first record Nov 11, 2024) with no new permit activity recorded in 2 yr.
- New home (Issued)0.48 mi SE
Active in "Issued" for 6.7 yr (first record Feb 20, 2020) with no new permit activity recorded in 6.7 yr.
- New home (Issued)0.49 mi S
Active in "Issued" for 2 yr (first record Nov 21, 2024) with no new permit activity recorded in 2 yr.
Entity-resolved builders & contractors in ½ mile: Tesla Electric (1 on parcel, 1 in ½ mi · Solar / battery storage); Schalich Brothers Construction (4 in ½ mi · Remodel / interior alteration); Cartwright Construction (2 in ½ mi · New garage / accessory structure); G Family (2 in ½ mi · Remodel / interior alteration); Von Der Werth (2 in ½ mi · Addition (adds square footage)).
Permit & Project History on This Parcel (1 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 157665 | Solar / battery storage | Issued | Iss. Feb 12, 2018 | $15,985 | P V 8.235 K W- Express |