59 Washington Park Ave
Mill Valley 94941 · Muir Woods Park · Unincorporated Marin · Coordinates: 37.90571, -122.57076
Executive Verdict · Public-Records Synthesis
Zoned R1-B2 in Unincorporated Marin and mapped CAL FIRE high fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,263,000 ($1,991,000–$2,535,000).
Upsides & Opportunities
- ✓ Documented permitted upgrades (+$132,000 contributory est.)
Public building records show issued construction/renovation work on this parcel (5 total permits, latest Jan 15, 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 High Fire Hazard Severity Zone (State Responsibility Area) (about 36% 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
Remodel / interior alteration (178450): Issued after 6 mo (2.1× the 83d median) — above the 75th percentile for remodel / interior alteration permits in Unincorporated Marin (median 83d, 75th pct 148d, n=1,054).
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 526 Panoramic Hwy (0.3 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:
- 9,757 sq ft (0.22 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 59 WASHINGTON PARK AVE
Zoning & Land Use
R1-B2 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUPossible, with conditions
Zoned R1-B2 (single-family residential): state law allows ADUs where homes are allowed. Very High Fire Hazard Severity Zone covers about 64% of the lot: cities may limit ADUs here for fire safety and evacuation.
- SB 9: two homes on the lotPossible, with conditions
Zoned R1-B2, a single-family residential zone. Very High Fire Hazard Severity Zone (State responsibility area) covers about 64% of the lot: SB 9 requires the project to meet the fire hazard mitigation standards.
- SB 9: split into two lotsPossible, with conditions
Zoned R1-B2, a single-family residential zone. The lot is 9,757 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. Very High Fire Hazard Severity Zone (State responsibility area) covers about 64% of the lot: SB 9 requires the project to meet the fire hazard mitigation standards.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- High Fire Hazard Severity Zone (State Responsibility Area) (about 36% of the lot, map Apr 1, 2024); Very High Fire Hazard Severity Zone (State Responsibility Area) (about 64% of the lot, map Apr 1, 2024)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0465E, effective August 15, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,991,000 – $2,535,000 · Status: Off market
HUD Small Area FMR (ZIP 94941) · FY 2026
Studio $2,730 · 1BR $3,270 · 2BR $3,960 · 3BR $5,060 · 4BR $5,240
Developments Deserving Closer Investigation & Active Area Builders
- New home at 526 Panoramic Hwy (Issued)0.3 mi SE
Active in "Issued" for 4.6 yr (first record Apr 21, 2022) with no new permit activity recorded in 2 yr. High-impact scale (1 housing unit, $1,329,450 declared valuation across 2 permits).
- Remodel / interior alteration (178450) (Issued)On this parcel
Issued after 6 mo (2.1× the 83d median) — above the 75th percentile for remodel / interior alteration permits in Unincorporated Marin (median 83d, 75th pct 148d, n=1,054).
- New home at 120 Redwood Ave (Issued)0.25 mi SE
Active in "Issued" for 14.9 yr (first record Dec 27, 2011) with no new permit activity recorded in 11.9 yr.
- New home (Issued)0.44 mi N
Active in "Issued" for 7.1 yr (first record Sep 30, 2019) with no new permit activity recorded in 7.1 yr.
Entity-resolved builders & contractors in ½ mile: Edri Construction (1 on parcel, 1 in ½ mi · Remodel / interior alteration); Cali Siding And Windows (1 on parcel, 1 in ½ mi · Windows / doors / siding); Jmo Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Jmo Construction And Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Zaragoza Plumbing (1 on parcel, 1 in ½ mi · Plumbing / water heater / sewer).
Permit & Project History on This Parcel (5 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 178450 | Remodel / interior alteration | Issued | Iss. Jan 15, 2025 | $250,000 | Kitchen Rmdl; Reloc 2nd Fl Bath; Skylights; Windows; Reroof; Glass Railing (Dormer Addition Eliminated From Scope) |
| B37791 | Electrical / panel | Issued | Iss. Apr 24, 2024 | $5,000 | Service Upgrade to 200 Amps — Service Upgrade |
| B36825 | Windows / doors / siding | Issued | Iss. Jan 25, 2024 | $16,000 | Install new James hardie cement siding on detached garage only. — Siding Replacement |
| B34728 | Electrical / panel | Issued | Iss. Jul 14, 2023 | $5,050 | Main Service Upgrade in which it is currently 100 amps and will upgrade to 200 amps. — Service Upgrade |
| 155205 | Plumbing / water heater / sewer |