693 Edgewood Ave
Mill Valley 94941 · Muir Woods Park · Unincorporated Marin · Coordinates: 37.90461, -122.56715
Executive Verdict · Public-Records Synthesis
Zoned R1-B2 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 $2,188,000 ($1,925,000–$2,451,000).
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 13,024 sq ft lot.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$9,696 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest Apr 12, 2026).
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
General repair (176480): Issued after 9 mo (3.4× the 83d median) — above the 75th percentile for general repair permits in Unincorporated Marin (median 83d, 75th pct 181d, n=693).
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 at 526 Panoramic Hwy (0.2 mi S, 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:
- 13,024 sq ft (0.30 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 693 EDGEWOOD AVE
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 13,024 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 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: $1,925,000 – $2,451,000 · 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)0.2 mi S
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).
- General repair (176480) (Issued)On this parcel
Issued after 9 mo (3.4× the 83d median) — above the 75th percentile for general repair permits in Unincorporated Marin (median 83d, 75th pct 181d, n=693).
- New home at 49 Ridge Ave (Applied)0.46 mi S
In "Applied" for 5.1 yr (since Oct 15, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home at 120 Redwood Ave (Issued)0.12 mi S
Active in "Issued" for 14.9 yr (first record Dec 27, 2011) with no new permit activity recorded in 11.9 yr.
Entity-resolved builders & contractors in ½ mile: Creekside Custom Builders (2 on parcel, 2 in ½ mi · Other); Divine Electric (2 on parcel, 2 in ½ mi · Electrical / panel); Linscott Engineering Contractors (1 on parcel, 1 in ½ mi · General repair); Sonomarin Solar_inc (1 on parcel, 1 in ½ mi · Solar / battery storage); Maap (1 on parcel, 1 in ½ mi · Windows / doors / siding).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B46467 | Other | Issued | Iss. Apr 12, 2026 | $65,000 | — |
| B44402 | EV charger | Issued | Iss. Oct 16, 2025 | $4,800 | Run new 60 amp 240 volt circuit from the 125 amp Main Service Panel to the garage for new Tesla Wall Connector EVSE. Cir… |
| B43458 | Other | Issued | Iss. Aug 19, 2025 | $80,000 | Main Bathroom remodel in kind, no structural changes |
| B37822 | Solar / battery storage | Issued | Iss. Apr 25, 2024 | $23,421 | Photovoltaic- residential flush roof mount, grid tied. ESS installation with (2) Enphase 1Q5P ESS Units |
| 176480 | General repair | Issued | Iss. Apr 25, 2024 |