441 Wilson Ave
Novato 94947 · Indian Valley · Unincorporated Marin · Coordinates: 38.09299, -122.60757
Executive Verdict · Public-Records Synthesis
Zoned A2-B4 in Unincorporated Marin and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,518,000 ($1,336,000–$1,700,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$378,653 contributory est.)
Public building records show issued construction/renovation work on this parcel (3 total permits, latest Jan 14, 2022).
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 High Fire Hazard Severity Zone (State Responsibility Area) (about 99% 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 443 Wilson Ave (aka 441): Active in "Issued" for 5.4 yr (first record Jun 25, 2021) with no new permit activity recorded in 4.8 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 10 Tanglewood Ln (0.25 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:
- 843,801 sq ft (19.37 ac)
- Assessor use:
- Open Space - Improved
- Addresses on lot:
- 441 WILSON AVE
Zoning & Land Use
A2-B4 — Agriculture Limited (Unincorporated Marin)
Undesignated — Undesignated (Novato)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
Zoned A2-B4 (agricultural): ADUs are allowed if the zone allows a home, which depends on the zone's rules. The parcel point also falls in Undesignated.
- SB 9: two homes on the lotUnlikely
Zoned A2-B4 (agricultural), not a single-family residential zone. The parcel point also falls in Undesignated.
- SB 9: split into two lotsUnlikely
Zoned A2-B4 (agricultural), not a single-family residential zone. The parcel point also falls in Undesignated.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (State Responsibility Area) (about 99% of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0278D, 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: $1,336,000 – $1,700,000 · Status: Off market
HUD Small Area FMR (ZIP 94947) · FY 2026
Studio $2,250 · 1BR $2,690 · 2BR $3,260 · 3BR $4,160 · 4BR $4,320
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 443 Wilson Ave (aka 441) (Issued)On this parcel
Active in "Issued" for 5.4 yr (first record Jun 25, 2021) with no new permit activity recorded in 4.8 yr.
- Accessory dwelling unit at 441 Wilson Ave (Issued)On this parcel
Active in "Issued" for 5.7 yr (first record Feb 25, 2021) with no new permit activity recorded in 5.7 yr.
- New home at 10 Tanglewood Ln (Issued)0.25 mi SE
Active in "Issued" for 8.5 yr (first record May 24, 2018) with no new permit activity recorded in 7.2 yr.
- New home at 1970 Indian Valley Rd (Issued)0.41 mi NE
Active in "Issued" for 10 yr (first record Nov 14, 2016) with no new permit activity recorded in 4 yr.
Entity-resolved builders & contractors in ½ mile: Owner (1 on parcel, 5 in ½ mi · Accessory dwelling unit (new or conversion)); Michael J Arruda Construction (1 on parcel, 1 in ½ mi · Accessory dwelling unit (new or conversion)); Diablo Solar Services (1 on parcel, 1 in ½ mi · Solar / battery storage); Owner Builder (5 in ½ mi · Remodel / interior alteration); Design Build Specialists (2 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (3 permits, 2 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 170400 | Accessory dwelling unit (new or conversion) | Issued | Iss. Jan 14, 2022 | $450,000 | Detached A D U |
| 167450 | Solar / battery storage | Issued | Iss. Mar 18, 2021 | $45,000 | 11.52kw Ground Mount Photovoltaic & Energy Storage System |
| B24970 | Accessory dwelling unit (new or conversion) | Issued | Iss. Feb 25, 2021 | $5,000 | I am seeking a permit from the county to relocate our existing 200-Amp electrical panel and replace it with a 400-Amp el… |
2 entries (report years 2021, 2022).