4 Nicasio Creek Rd
Nicasio 94946 · Nicasio · Unincorporated Marin · Coordinates: 38.06008, -122.70111
Executive Verdict · Public-Records Synthesis
Zoned ARP-7 in Unincorporated Marin and mapped FEMA A flood / CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,089,000 ($1,838,000–$2,340,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$6,080 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Feb 4, 2026).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (A, about 32% of the lot of lot)
Zone A: 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)
- ! 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
Accessory dwelling unit at 4 Nicasio Creek Rd: In "Applied" for 5.7 yr (since Feb 24, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 3 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 29 Lafranchi Ln (0.18 mi W, applied). 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:
- 164,352 sq ft (3.77 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 4 NICASIO CREEK RD
Zoning & Land Use
ARP-7 — Agriculture Residential Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned ARP-7 (agricultural): ADUs are allowed if the zone allows a home, which depends on the zone's rules.
- SB 9: two homes on the lotUnlikely
Zoned ARP-7 (agricultural), not a single-family residential zone.
- SB 9: split into two lotsUnlikely
Zoned ARP-7 (agricultural), not a single-family residential zone.
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 A: 1% annual chance flood (Special Flood Hazard Area) (about 32% of the lot); Zone X: minimal flood hazard (about 68% of the lot) · FIRM panel 06041C0275D, effective May 4, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,838,000 – $2,340,000 · Status: Off market
HUD Small Area FMR (ZIP 94946) · FY 2026
Studio $2,050 · 1BR $2,510 · 2BR $2,990 · 3BR $3,730 · 4BR $3,960
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 4 Nicasio Creek Rd (Applied)On this parcel
In "Applied" for 5.7 yr (since Feb 24, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- Accessory dwelling unit (new or conversion) (87619) (Applied)On this parcel
Pending in review for 5.7 yr (10.2× the 204d median) — slower than 90% of accessory dwelling unit (new or conversion) permits in Unincorporated Marin (median 204d, 90th pct 549d, n=298).
- Solar / battery storage (166691) (Issued)On this parcel
Issued after 2 mo — slower than 90% of solar / battery storage permits in Unincorporated Marin (median 0d, 90th pct 2d, n=2,977).
- Accessory dwelling unit at 29 Lafranchi Ln (Applied)0.18 mi W
In "Applied" for 5.1 yr (since Oct 19, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Entity-resolved builders & contractors in ½ mile: Owner (1 on parcel, 2 in ½ mi · Electrical / panel); Ernest Ongaro And Sons (2 on parcel, 2 in ½ mi · HVAC / heat pump); Shelter Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Sonomarin Solar_inc (1 on parcel, 1 in ½ mi · Other); La Solar Group (1 on parcel, 1 in ½ mi · Solar / battery storage).
Permit & Project History on This Parcel (7 permits, 1 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B45757 | Roof replacement | Issued | Iss. Feb 4, 2026 | $36,750 | ReRoofing; With Electronic Inspection |
| B45700 | Other | Issued | Iss. Feb 2, 2026 | $27,426 | — |
| B41338 | Plumbing / water heater / sewer | Issued | Iss. Feb 20, 2025 | $3,000 | Replace tanked water heater with tankless water heater- run approx 40' of galv gas line from riser, under home, to tankl… |
| B27307 | HVAC / heat pump | Issued | Iss. Oct 20, 2021 | $8,500 | Replace failed furnace and AC with new heat pump and air handler — Replace Mechanical Appliance |