229 Trinidad Dr
Tiburon 94920 · Paradise Cay · Unincorporated Marin · Coordinates: 37.91378, -122.47896
Executive Verdict · Public-Records Synthesis
Zoned RMP-1.35-BFC in Unincorporated Marin with likely ministerial ADU eligibility and mapped CAL FIRE moderate fire hazard severity zone (local responsibility area) due diligence; benchmark value $3,243,000 ($2,854,000–$3,632,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone RMP-1.35-BFC allows residential use qualifying for ministerial ADU review under state law.
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ Documented permitted upgrades (+$34,440 contributory est.)
Public building records show issued construction/renovation work on this parcel (5 total permits, latest Nov 1, 2017).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! Mapped flood awareness zone (Zone X: minimal flood hazard)
all of the lot of the parcel intersects Zone X: minimal flood hazard. Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! CAL FIRE Moderate Fire Hazard Severity Zone (Local Responsibility Area) (about 77% 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 Mar 24, 2025)
- ! Delayed or open permit activity on this parcel
New home at 229 Trinidad Dr (lot #10): Active in "Issued" for 12.7 yr (first record Feb 12, 2014) with no new permit activity recorded in 12.3 yr.
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: New home at 149 Jamaica St (0.19 mi SE, 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)
Parcel & Assessor
- Lot size:
- 15,420 sq ft (0.35 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 229 TRINIDAD DR
Zoning & Land Use
RMP-1.35-BFC — Residential Multiple Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RMP-1.35-BFC (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs.
- SB 9: two homes on the lotUnlikely
Zoned RMP-1.35-BFC (multifamily residential), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned RMP-1.35-BFC (multifamily residential), not a single-family residential zone.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (Local Responsibility Area) (about 77% of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all 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: $2,854,000 – $3,632,000 · 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 229 Trinidad Dr (lot #10) (Issued)On this parcel
Active in "Issued" for 12.7 yr (first record Feb 12, 2014) with no new permit activity recorded in 12.3 yr.
- Plumbing / water heater / sewer (155520) (Issued)On this parcel
Issued after 2 mo — slower than 90% of plumbing / water heater / sewer permits in Unincorporated Marin (median 0d, 90th pct 0d, n=2,211).
- New home at 149 Jamaica St (Issued)0.19 mi SE
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 at 4970 Ranch Rd (Issued)0.34 mi NW
Active in "Issued" for 11.4 yr (first record Jun 2, 2015) with no new permit activity recorded in 11.2 yr. High-impact scale (1 housing unit, $1,200,000 declared valuation across 1 permit).
Entity-resolved builders & contractors in ½ mile: Davidson Builders (2 on parcel, 10 in ½ mi · New single-family home); Geary Construction (1 on parcel, 1 in ½ mi · Addition (adds square footage)); Jbl Solar Energy (1 on parcel, 1 in ½ mi · Solar / battery storage); Owner Builder (16 in ½ mi · Remodel / interior alteration); Owner (12 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (5 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 156939 | Addition (adds square footage) | Issued | Iss. Nov 1, 2017 | $50,000 | Encl Porch***Expired T.D. 8/18/17 |
| 155520 | Plumbing / water heater / sewer | Issued | Iss. May 22, 2017 | $8,500 | Outdr Kitch; Firepit; Electric For Portable Spa T.D. 3/28/17 |
| 155337 | Solar / battery storage | Issued | Iss. May 3, 2017 | $36,250 | 8.6kw Roof Mounted Photovoltaic - Express |
| 143600 | General repair | Issued | Iss. Aug 5, 2014 | $10,000 | Retaining Wall |