670 Goodhill Rd
Kentfield 94904 · Kentfield · Unincorporated Marin · Coordinates: 37.95576, -122.56786
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 $2,519,000 ($2,217,000–$2,821,000).
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 21,432 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 (+$77,760 contributory est.)
Public building records show issued construction/renovation work on this parcel (6 total permits, latest Apr 19, 2023).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (parcel APN)
- ✓ Above-average reinvestment in Kentfield
103 substantial renovation & housing permits over 24 months (40.9 per 1,000 parcels vs. 16.3 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 SE, 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 (~$29,419/yr at $2,519,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,452/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:
- 21,432 sq ft (0.49 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 670 GOODHILL 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 21,432 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: $2,217,000 – $2,821,000 · 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
Nearby Activity (½ mile radius, since November 2024)
12 active or recent development projects (12 housing units across completed, permitted, and pipeline stages) and 123 total building permits recorded within ½ mile.
- New construction6 permits (2 units)
- Adds housing (ADU)7 permits (7 units)
- Demolition1 permit
- Additions & renovations15 permits
- Building systems71 permits
- Repairs9 permits
- Other14 permits
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 432 Woodland Rd (Applied)0.45 mi SE
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 15 Spring Rd (Issued)0.15 mi SE
Active in "Issued" for 11.4 yr (first record Jun 24, 2015) with no new permit activity recorded in 11.1 yr. High-impact scale (1 housing unit, $2,745,000 declared valuation across 1 permit).
- Rafenelli- Goodenoff (Issued)0.42 mi N
Active in "Issued" for 9.3 yr (first record Jul 13, 2017) with no new permit activity recorded in 9.3 yr. High-impact scale (1 housing unit, 1 deed-restricted affordable across 0 permits).
- 196 Lagunitas (Entitled)0.41 mi N
In "Entitled" for 3.6 yr (since Apr 19, 2023), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
Entity-resolved builders & contractors in ½ mile: Owner Builder (1 on parcel, 16 in ½ mi · Remodel / interior alteration); Hendrickson Pools (1 on parcel, 8 in ½ mi · Pool / spa); Sunpower (2 on parcel, 2 in ½ mi · Solar / battery storage); Sun First (1 on parcel, 1 in ½ mi · Solar / battery storage); Kinetic Lighting And 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 |
|---|---|---|---|---|---|
| B33510 | Solar / battery storage | Issued | Iss. Apr 19, 2023 | $46,760 | INSTALLATION OF ROOF-MOUNTED PV SYSTEM - 23.38 KW (55 MODULES) WITH (N)225A LOAD CENTER |
| B33396 | Solar / battery storage | Issued | Iss. Apr 14, 2023 | $46,760 | INSTALLATION OF ROOF-MOUNTED PV SYSTEM - 23.38 KW (55 MODULES) WITH (N)225A LOAD CENTER |
| 164695 | Solar / battery storage | Issued | Iss. May 21, 2020 | $126,400 | Photovoltaic 14kw (60.1) Energy Storage System *Fast Track |
| B19781 | Electrical / panel | Issued | Iss. Sep 5, 2019 | $15,000 | Relocate and upgrade electrical service to 400a — Service Upgrade |
| 162444 | New garage / accessory structure | Issued | Iss. Aug 26, 2019 | $275,000 | Turn Old Garage Into Living Space & New Deck; New Garage; New Mud Room, Rmdl Laundry And 1/2 Bath To Full Bath T.D. 7/12… |
| 162037 | Pool / spa | Issued | Iss. Jul 11, 2019 | $150,000 | Pool & Spa |