14 Hillcrest Rd
Tiburon 94920 · Unincorporated Tiburon · Unincorporated Marin · Coordinates: 37.90474, -122.48025
Executive Verdict · Public-Records Synthesis
Zoned R1-B2 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $3,144,000 ($2,767,000–$3,521,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1-B2 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 11,195 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$12,213 contributory est.)
Public building records show issued construction/renovation work on this parcel (9 total permits, latest Dec 26, 2025).
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 (State Responsibility Area) (all 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: New home (0.16 mi S, 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 (~$36,606/yr at $3,144,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$3,051/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:
- 11,195 sq ft (0.26 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 14 HILLCREST RD
Zoning & Land Use
R1-B2 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B2 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B2, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B2, a single-family residential zone. The lot is 11,195 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (State Responsibility Area) (all of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0488E, 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: $2,767,000 – $3,521,000 · 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 (Issued)0.16 mi S
Active in "Issued" for 3.8 yr (first record Feb 9, 2023) with no new permit activity recorded in 3.8 yr.
- New home (Issued)0.34 mi S
Active in "Issued" for 2.2 yr (first record Sep 11, 2024) with no new permit activity recorded in 2.2 yr.
- New home at 4134 Paradise Dr (aka 4130) (Issued)0.34 mi E
Active in "Issued" for 4.4 yr (first record Jun 2, 2022) with no new permit activity recorded in 4.2 yr.
- Accessory dwelling unit at 4126 Paradise Dr (aka 4126a) (Issued)0.36 mi E
Active in "Issued" for 4.4 yr (first record Jun 9, 2022) with no new permit activity recorded in 3.6 yr.
Entity-resolved builders & contractors in ½ mile: Sonomarin Solar_inc (2 on parcel, 2 in ½ mi · Electrical / panel); Sears Home Improvement Products (2 on parcel, 2 in ½ mi · Windows / doors / siding); Equinox Roofing Solutions (1 on parcel, 1 in ½ mi · Roof replacement); Sameday Plumbing Heating And Cooling (1 on parcel, 1 in ½ mi · HVAC / heat pump); Transform Sr Home Improvement Products (1 on parcel, 1 in ½ mi · Windows / doors / siding).
Permit & Project History on This Parcel (9 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B45280 | HVAC / heat pump | Issued | Iss. Dec 26, 2025 | $12,000 | ADD NEW DUCTLESS MINI SPLIT — Mechanical Appliance |
| B39117 | Plumbing / water heater / sewer | Issued | Iss. Aug 14, 2024 | $2,500 | Remove failed 50 gal tanked gas water heater in crawlspace, install new electric 50 gal tank water in same location. — R… |
| B38818 | Electrical / panel | Issued | Iss. Jul 22, 2024 | $4,000 | 150 Amp to 150 Amp Electric Upgrade — Service Upgrade |
| B38612 | Solar / battery storage | Issued | Iss. Jul 3, 2024 | $29,500 | Photovoltaic- Residential Flush Roof Mount, Grid Tied ESS Installation with (1) Tesla Powerwall 3 ESS Unit |
| B38504 | Roof replacement |