26 Zephyr Ct
San Rafael 94903 · Lucas Valley · Unincorporated Marin · Coordinates: 38.03127, -122.58182
Executive Verdict · Public-Records Synthesis
Zoned R1-B-LV in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE high fire hazard severity zone (local responsibility area) due diligence; benchmark value $1,390,000 ($1,223,000–$1,557,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1-B-LV supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 7,710 sq ft lot. Local precedent is active with 2 ADU permits within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ Documented permitted upgrades (+$14,400 contributory est.)
Public building records show issued construction/renovation work on this parcel (4 total permits, latest Mar 10, 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 (Local 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 Mar 24, 2025)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: Demolition at 2000 Lucas Valley Rd (0.13 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 (~$16,435/yr at $1,390,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,370/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:
- 7,710 sq ft (0.18 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 26 ZEPHYR CT
Zoning & Land Use
R1-B-LV — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B-LV (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B-LV, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B-LV, a single-family residential zone. The lot is 7,710 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 (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0289D, 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: $1,223,000 – $1,557,000 · Status: Off market
HUD Small Area FMR (ZIP 94903) · FY 2026
Studio $2,880 · 1BR $3,450 · 2BR $4,180 · 3BR $5,340 · 4BR $5,530
Nearby Activity (½ mile radius, since November 2024)
2 active or recent development projects (2 housing units across completed, permitted, and pipeline stages) and 216 total building permits recorded within ½ mile.
- Adds housing (ADU)2 permits (2 units)
- Demolition2 permits
- Additions & renovations10 permits
- Building systems161 permits
- Repairs2 permits
- Other39 permits
Developments Deserving Closer Investigation & Active Area Builders
- Demolition at 2000 Lucas Valley Rd (Applied)0.13 mi NW
In "Applied" for 4.4 yr (since Jun 7, 2022), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
- Accessory dwelling unit at 42 Oak Mountain Ct (Applied)0.17 mi N
In "Applied" for 5.5 yr (since Apr 30, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- Accessory dwelling unit at 1 Golden Lily Pl (Applied)0.36 mi NW
In "Applied" for 4.8 yr (since Jan 20, 2022), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- Demolition at 1605 Lucas Valley Rd (Issued)0.15 mi S
Active in "Issued" for 8.5 yr (first record May 29, 2018) with no new permit activity recorded in 8.4 yr.
Entity-resolved builders & contractors in ½ mile: Earthwise Energy Solutions (2 on parcel, 2 in ½ mi · Electrical / panel); Constructive Works Groups (1 on parcel, 1 in ½ mi · Remodel / interior alteration); Acco Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Owner Builder (22 in ½ mi · Remodel / interior alteration); Owner (9 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (4 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B29024 | Electrical / panel | Issued | Iss. Mar 10, 2022 | $4,500 | New Main Panel Upgrade from 100A to 200A — Service Upgrade |
| 167266 | Solar / battery storage | Issued | Iss. Mar 1, 2021 | $65,604 | 11.2kw Rooftop Photovoltaic & Energy Storage System |
| B24893 | Electrical / panel | Issued | Iss. Feb 16, 2021 | $3,000 | Change electrical service from 100AMP to 125 AMP — Service Upgrade |
| 144883 | Remodel / interior alteration | Issued | Iss. Nov 12, 2014 | $23,000 | Rmdl Kit & 2 Bas |