88 Trinidad Dr
Tiburon 94920 · Paradise Cay · Unincorporated Marin · Coordinates: 37.90865, -122.47523
Executive Verdict · Public-Records Synthesis
Zoned RSP-2.4-BFC in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA AE flood due diligence; benchmark value $3,149,000 ($2,771,000–$3,527,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RSP-2.4-BFC allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$18,000 contributory est.)
Public building records show issued construction/renovation work on this parcel (1 total permit, latest Jan 20, 2026).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (AE, about 50% 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home at 149 Jamaica St (0.24 mi N, 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 (~$36,664/yr at $3,149,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$3,055/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:
- 11,151 sq ft (0.26 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 88 TRINIDAD DR
Zoning & Land Use
RSP-2.4-BFC — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-2.4-BFC (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned RSP-2.4-BFC, a single-family residential zone. FEMA Special Flood Hazard Area (Zone AE) covers about 50% 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-2.4-BFC, a single-family residential zone. The lot is 11,151 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 50% 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
- 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 50% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 35% of the lot); Zone X: minimal flood hazard (about 15% of the lot) · FIRM panel 06041C0486E, 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: $2,771,000 – $3,527,000 · 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
- New home at 149 Jamaica St (Issued)0.24 mi N
Active in "Issued" for 12.2 yr (first record Aug 19, 2014) with no new permit activity recorded in 12 yr. High-impact scale (1 housing unit, $750,000 declared valuation across 1 permit).
- New home (Entitled)0.21 mi N
In "Entitled" for 5.1 yr (since Oct 7, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home at 100 Jamaica St (Issued)410 ft N
Active in "Issued" for 11.4 yr (first record Jun 2, 2015) with no new permit activity recorded in 11.1 yr.
- New home (Issued)0.33 mi NW
Active in "Issued" for 4.6 yr (first record Mar 21, 2022) with no new permit activity recorded in 4.6 yr.
Entity-resolved builders & contractors in ½ mile: Al Electric (1 on parcel, 1 in ½ mi · Solar / battery storage); Owner Builder (15 in ½ mi · Remodel / interior alteration); Owner (12 in ½ mi · Remodel / interior alteration); Davidson Builders (5 in ½ mi · New single-family home); Singlepoint Design Build (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 |
|---|---|---|---|---|---|
| B45574 | Solar / battery storage | Issued | Iss. Jan 20, 2026 | $54,420 | INSTALL A HELLIOSESS BATTERY MODULE WITH ROOF MOUNTED SOLAR PHOTOVOLTAIC SISTEM AT THE OWNER RESIDENCE.THE POWER GENERAT… |