123 Crown Rd
Kentfield 94904 · Kentfield · Unincorporated Marin · Coordinates: 37.94854, -122.57063
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 $2,510,000 ($2,209,000–$2,811,000).
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 31,450 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 (+$41,400 contributory est.)
Public building records show issued construction/renovation work on this parcel (5 total permits, latest Jan 23, 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)
- ! Delayed or open permit activity on this parcel
Pool / spa (176706): Issued after 14 mo (3.1× the 136d median) — slower than 90% of pool / spa permits in Unincorporated Marin (median 136d, 90th pct 393d, n=162).
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: Accessory dwelling unit at 432 Woodland Rd (0.43 mi E, 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)
Parcel & Assessor
- Lot size:
- 31,450 sq ft (0.72 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 123 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 31,450 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: $2,209,000 – $2,811,000 · 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)0.43 mi E
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).
- Pool / spa (176706) (Issued)On this parcel
Issued after 14 mo (3.1× the 136d median) — slower than 90% of pool / spa permits in Unincorporated Marin (median 136d, 90th pct 393d, n=162).
- New home at 101 Crown Rd (Issued)0.12 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 605 Goodhill Rd (adu 605 A) (Issued)0.22 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: Hendrickson Pools (1 on parcel, 9 in ½ mi · Pool / spa); Ernest Ongaro And Sons (2 on parcel, 2 in ½ mi · Electrical / panel); James S Clough Enterprises (1 on parcel, 1 in ½ mi · General repair); Heffernan Electric (1 on parcel, 1 in ½ mi · Electrical / panel); Owner Builder (13 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (5 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B40982 | Electrical / panel | Issued | Iss. Jan 23, 2025 | $10,500 | Install new Generac 24KW Generator on generator pad with a 200 amp Automatic Transfer Switch (ATS) on backside of house |
| B40259 | HVAC / heat pump | Issued | Iss. Nov 21, 2024 | $11,700 | Replace failed ducting with new ducting and install AC new — Replace Ductwork, Mechanical Appliance |
| 176706 | Pool / spa | Issued | Iss. May 23, 2024 | $112,000 | Demo (E) Pool; (N) Pool W/ Safety Cover |
| 176516 | General repair | Issued | Iss. Apr 29, 2024 | $60,975 | Replace (E) Guardrails Only At Rear Deck & Stairs |
| B31335 | Electrical / panel | Issued |