4 Fir Ave
Woodacre 94973 · Woodacre · Unincorporated Marin · Coordinates: 38.00875, -122.64769
Executive Verdict · Public-Records Synthesis
Zoned R1-B3-SGV in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $1,124,000 ($989,000–$1,259,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1-B3-SGV supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 10,062 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ 4 documented municipal building permits on file
On-parcel permit history is indexed through Feb 23, 2026, 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 High 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 (94019): Pending in review for 9 mo (4.8× 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: Demolition at 0 Sylvan Way (0.14 mi NE, 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:
- 10,062 sq ft (0.23 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 4 FIR AVE
Zoning & Land Use
R1-B3-SGV — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B3-SGV (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B3-SGV, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B3-SGV, a single-family residential zone. The lot is 10,062 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
- High 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 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: $989,000 – $1,259,000 · Status: Off market
HUD Small Area FMR (ZIP 94973) · FY 2026
Studio $2,080 · 1BR $2,510 · 2BR $3,020 · 3BR $3,860 · 4BR $4,000
Developments Deserving Closer Investigation & Active Area Builders
- Demolition (94019) (Applied)On this parcel
Pending in review for 9 mo (4.8× the 55d median) — slower than 90% of demolition permits in Unincorporated Marin (median 55d, 90th pct 261d, n=130).
- Demolition at 0 Sylvan Way (Applied)0.14 mi NE
In "Applied" for 2.6 yr (since Apr 22, 2024), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
- Accessory dwelling unit at 209 San Geronimo Valley Dr (Applied)0.27 mi N
In "Applied" for 6.3 yr (since Jul 28, 2020), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- Demolition at 16 Meadow View Ln (Applied)0.45 mi W
In "Applied" for 8.5 yr (since May 29, 2018), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
Entity-resolved builders & contractors in ½ mile: Owner (1 on parcel, 8 in ½ mi · Remodel / interior alteration); Marin Heating And Air (1 on parcel, 1 in ½ mi · HVAC / heat pump); No Ark Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Owner Builder (5 in ½ mi · New garage / accessory structure); Juan Calmell (3 in ½ mi · New single-family home).
Permit & Project History on This Parcel (4 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 94019 | Demolition | Applied | App. Feb 23, 2026 | $500 | Legalize Basement Bath; Demo Unpermitted Deck; Juliet Balcony Railing - B W O P |
| B43539 | HVAC / heat pump | Issued | Iss. Sep 3, 2025 | $24,000 | (1) NEW 3 TON MINI SPLIT WITH 4 WALL MOUNTED MITSUBISHI DUCTLESS AIR HANDLERSTO BE INSTALLED - NEED ELE: NO — Mechanical… |
| 179635 | Electrical / panel | Issued | Iss. Jul 15, 2025 | $1,000 | Replace Approx 532sf Of Sheetrock (Removed During Unsafe Electrical Work) - No Change To Framing Included. |
| B42212 | Electrical / panel | Issued | Iss. May 15, 2025 | $20,000 | Up grade wiring. — New Circuits / Outlets, Replace Circuits / Outlets |