135 Crown Rd
Kentfield 94904 · Kentfield · Unincorporated Marin · Coordinates: 37.94767, -122.57059
Executive Verdict · Public-Records Synthesis
Zoned RSP-1 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and mapped CAL FIRE moderate fire hazard severity zone (state responsibility area) due diligence; benchmark value $2,490,000 ($2,191,000–$2,789,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 23,479 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 (+$32,304 contributory est.)
Public building records show issued construction/renovation work on this parcel (7 total permits, latest May 15, 2025).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
- ✓ Above-average reinvestment in Kentfield
104 substantial renovation & housing permits over 24 months (41.3 per 1,000 parcels vs. 16.4 citywide baseline) (#7 of 22 neighborhoods).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (Kentfield)
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 Moderate 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)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 432 Woodland Rd (0.45 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)
- ! Year 1 Prop 13 tax reset (~$29,085/yr at $2,490,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,424/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:
- 23,479 sq ft (0.54 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 135 CROWN RD
Zoning & Land Use
RSP-1 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-1, a single-family residential zone. The lot is 23,479 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
- Moderate 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 06041C0454E, effective March 17, 2014
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,191,000 – $2,789,000 · Status: Off market
HUD Small Area FMR (ZIP 94904) · FY 2026
Studio $2,260 · 1BR $2,710 · 2BR $3,280 · 3BR $4,190 · 4BR $4,340
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 432 Woodland Rd (Applied)0.45 mi NE
In "Applied" for 2.6 yr (since Apr 12, 2024), 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, $1,250,000 declared valuation across 1 permit).
- New home at 101 Crown Rd (Issued)0.17 mi NE
Active in "Issued" for 16 mo (first record Jul 1, 2025) with no new permit activity recorded in 7 mo. High-impact scale (1 housing unit, $5,368,000 declared valuation across 1 permit).
- Accessory dwelling unit at 4 Coronet Way (Issued)0.23 mi SE
Active in "Issued" for 10.2 yr (first record Aug 24, 2016) with no new permit activity recorded in 10.2 yr.
- Accessory dwelling unit at 605 Goodhill Rd (adu 605 A) (Issued)0.28 mi N
Active in "Issued" for 20 mo (first record Mar 12, 2025) with no new permit activity recorded in 15 mo.
Entity-resolved builders & contractors in ½ mile: Clean Point Solar (2 on parcel, 2 in ½ mi · Other); Semper Solaris Construction (1 on parcel, 1 in ½ mi · Solar / battery storage); Marin County Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Solarcraft Services (1 on parcel, 1 in ½ mi · Solar / battery storage); Bonney (1 on parcel, 1 in ½ mi · Plumbing / water heater / sewer).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B42422 | Solar / battery storage | Issued | Iss. May 15, 2025 | $16,400 | Adding Enphase 10T (10kwh) battery to existing Enphase 10T system (30kwh) that was constructed by other company. EXISTIN… |
| B32734 | Solar / battery storage | Issued | Iss. Mar 2, 2023 | $24,000 | Installing 3 Enphase backup batteries, mounted to outside north facing wall, and connecting them to the solar system. |
| B32056 | Plumbing / water heater / sewer | Issued | Iss. Dec 15, 2022 | $8,100 | Remove failed Lochinvar Cadet condensing boiler. Supply and install 1 Navien NFB 175K btu condensing boiler and reconnec… |
| B28841 | Solar / battery storage | Issued | Iss. Feb 23, 2022 | $50,900 | INSTALLING 31.5 kWh ENERGY STORAGE SYSTEM, 3 (N) - IQ BATTERY-10-1P-NA BATTERY BACKUP TO (E) ROOF MOUNTED PHOTOVOLTAIC S… |