180 Highland Way
Inverness 94937 · Inverness · Unincorporated Marin · Coordinates: 38.09251, -122.85800
Executive Verdict · Public-Records Synthesis
Zoned C-RSP-0.2 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 $1,600,000 ($1,408,000–$1,792,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned C-RSP-0.2 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 226,991 sq ft lot. Local precedent is active with 1 ADU permit within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$10,800 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest Oct 15, 2023).
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)
- ! 3 slow or stalled nearby projects within ½ mile
Closest lead: New home at 60 Trossach Way (0.42 mi NW, 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)
- ! Year 1 Prop 13 tax reset (~$18,850/yr at $1,600,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,571/mo). Confirm exact Mello-Roos / CFD special assessments on the county tax bill.
Source: CA Const. Art. XIIIA (Prop 13) · County Tax Collector
Parcel & Assessor
- Lot size:
- 226,991 sq ft (5.21 ac)
- Assessor use:
- Commercial - Improved
- Addresses on lot:
- 180 HIGHLAND WAY
Zoning & Land Use
C-RSP-0.2 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned C-RSP-0.2 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned C-RSP-0.2, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned C-RSP-0.2, a single-family residential zone. The lot is 226,991 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 06041C0230E, 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: $1,408,000 – $1,792,000 · Status: Off market
HUD Small Area FMR (ZIP 94937) · FY 2026
Studio $2,400 · 1BR $2,870 · 2BR $3,480 · 3BR $4,450 · 4BR $4,610
Developments Deserving Closer Investigation & Active Area Builders
- New home at 60 Trossach Way (Applied)0.42 mi NW
In "Applied" for 5.9 yr (since Dec 15, 2020), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121). High-impact scale (1 housing unit, $1,400,000 declared valuation across 1 permit).
- New home at 182 Laurel Ave (Issued)0.32 mi NW
Active in "Issued" for 12.9 yr (first record Dec 31, 2013) with no new permit activity recorded in 11.9 yr.
- Accessory dwelling unit at 125 Forres Way (Issued)0.38 mi N
Active in "Issued" for 20 mo (first record Mar 14, 2025) with no new permit activity recorded in 19 mo.
- New home at 0 N Dream Farm Rd (apn#114-061-18) (Applied)500 ft W
High-impact scale (1 housing unit, $800,000 declared valuation across 2 permits).
Entity-resolved builders & contractors in ½ mile: Juan Calmell (1 on parcel, 2 in ½ mi · Commercial tenant improvement); Owner (1 on parcel, 2 in ½ mi · Addition (adds square footage)); Infinity Energy (2 on parcel, 2 in ½ mi · Electrical / panel); Solarcity Dba Tesla Energy (1 on parcel, 1 in ½ mi · Solar / battery storage); Clearview Electric (1 on parcel, 1 in ½ mi · Electrical / panel).
Permit & Project History on This Parcel (6 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B35781 | Electrical / panel | Issued | Iss. Oct 15, 2023 | $3,000 | Replace 100 Amp Well main service with new 100 Amp main service. — Service Upgrade |
| B29138 | Electrical / panel | Issued | Iss. Mar 21, 2022 | $5,000 | REPLACE (E) 200A MAIN SERVICE PANEL WITH A (N) 225A RATED MAIN PANEL WITH 200A FACTORY INSTALLED MAIN OCP — Service Upgr… |
| 167572 | Solar / battery storage | Issued | Iss. Mar 26, 2021 | $30,000 | Energy Storage System |
| 144159 | New garage / accessory structure | Issued | Iss. Sep 17, 2014 | $10,000 | Acc Struct - Bwop T.D. 6/5/14 - Imaged Under 144158 |
| 144158 | Addition (adds square footage) | Issued |