24 Hillcrest Rd
Tiburon 94920 · Unincorporated Tiburon · Unincorporated Marin · Coordinates: 37.90405, -122.48085
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 $3,175,000 ($2,794,000–$3,556,000).
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 13,373 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ 3 documented municipal building permits on file
On-parcel permit history is indexed through Dec 24, 2025, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
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)
- ! Delayed or open permit activity on this parcel
Demolition (93869): Pending in review for 11 mo (5.9× the 55d median) — slower than 90% of demolition permits in Unincorporated Marin (median 55d, 90th pct 261d, n=130).
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 (0.13 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:
- 13,373 sq ft (0.31 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 24 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 13,373 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: $2,794,000 – $3,556,000 · 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
- Demolition (93869) (Applied)On this parcel
Pending in review for 11 mo (5.9× the 55d median) — slower than 90% of demolition permits in Unincorporated Marin (median 55d, 90th pct 261d, n=130).
- New home (Issued)0.13 mi SE
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)0.31 mi SE
Active in "Issued" for 2.2 yr (first record Sep 11, 2024) with no new permit activity recorded in 2.2 yr.
- New home (Issued)0.35 mi SW
Active in "Issued" for 17 mo (first record Jun 18, 2025) with no new permit activity recorded in 17 mo.
Entity-resolved builders & contractors in ½ mile: Nor Cal Contracting (1 on parcel, 1 in ½ mi · Solar / battery storage); Leo Antone Heating And Air Conditioning (1 on parcel, 1 in ½ mi · HVAC / heat pump); Owner (3 in ½ mi · New garage / accessory structure); Owner Builder (2 in ½ mi · Addition (adds square footage)); Dolan Construction And Remodeling (2 in ½ mi · Addition (adds square footage)).
Permit & Project History on This Parcel (3 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 93869 | Demolition | Applied | App. Dec 24, 2025 | $987,854 | Interior Rmdl, Rplce Siding, (N)Windws&Doors,(N) Fence, Part-Demo Kitchn, Replce Hvac/Electl/Insultn, Remove Skylghts, (… |
| B42427 | HVAC / heat pump | Issued | Iss. May 16, 2025 | $8,175 | Replace furnace with new in same location in crawl space. — Replace Mechanical Appliance |
| 145357 | Solar / battery storage | Issued | Iss. Dec 31, 2014 | $26,775 | 8.9 Kw Roof Mounted Photovoltaic - Express |