103 Trinidad Dr
Tiburon 94920 · Paradise Cay · Unincorporated Marin · Coordinates: 37.90824, -122.47661
Executive Verdict · Public-Records Synthesis
Zoned RSP-2.4-BFC in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA VE flood due diligence; benchmark value $3,359,000 ($2,956,000–$3,762,000).
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 (+$49,593 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest May 9, 2023).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (VE, about 58% of the lot of lot)
Zone VE: 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
Other (174010): Issued after 5 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 5 slow or stalled nearby projects within ½ mile
Closest lead: New home at 149 Jamaica St (0.26 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 (~$39,079/yr at $3,359,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$3,257/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:
- 23,522 sq ft (0.54 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 103 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 VE) covers about 58% 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 23,522 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 VE) covers about 58% 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 VE: 1% annual chance flood (Special Flood Hazard Area) (about 58% of the lot); Zone X: minimal flood hazard (about 42% 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: $2,956,000 – $3,762,000 · 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
- Other (174010) (Issued)On this parcel
Issued after 5 mo — slower than 90% of other permits in Unincorporated Marin (median 0d, 90th pct 71d, n=1,562).
- New home at 149 Jamaica St (Issued)0.26 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)0.25 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)0.14 mi NE
Active in "Issued" for 11.5 yr (first record Jun 2, 2015) with no new permit activity recorded in 11.1 yr.
Entity-resolved builders & contractors in ½ mile: Marin Landscape Management (1 on parcel, 1 in ½ mi · Pool / spa); Simply Solar (1 on parcel, 1 in ½ mi · Solar / battery storage); One Hour Heating And Air (1 on parcel, 1 in ½ mi · HVAC / heat pump); Advanced Home Energy (1 on parcel, 1 in ½ mi · HVAC / heat pump); Gagne Brothers Enterprises (1 on parcel, 1 in ½ mi · Plumbing / water heater / sewer).
Permit & Project History on This Parcel (6 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 174010 | Other | Issued | Iss. May 9, 2023 | — | Legalize [E] Floating Dock - B W O P T.D. 2/13/23 |
| 169152 | Pool / spa | Issued | Iss. Aug 23, 2021 | $110,000 | Repl, Expand Deck & Stairs;Add Prefab Pool |
| 167160 | Solar / battery storage | Issued | Iss. Feb 16, 2021 | $37,759 | 7.4kw Rooftop Photovoltaic & Energy Storage System |
| B13041 | Plumbing / water heater / sewer | Issued | Iss. Aug 14, 2017 | $8,800 | REPLACING AND INSTALLING TANKLESS WATER HEATER AND DESIGNATED TANKLESS WATER HEATER. — Replace Plumbing Fixtures(s) |
| 143103 | HVAC / heat pump | Issued | Iss. Jun 25, 2014 |