227 S Ridgewood Rd
Kentfield 94904 · Kentfield · Unincorporated Marin · Coordinates: 37.94273, -122.55592
Executive Verdict · Public-Records Synthesis
Zoned RSP-0.5 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 $2,589,000 ($2,278,000–$2,900,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned RSP-0.5 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 86,554 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 (+$119,970 contributory est.)
Public building records show issued construction/renovation work on this parcel (9 total permits, latest Jul 31, 2020).
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
Remodel / interior alteration (161048): Issued after 9 mo (3.3× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
Source: County of Marin Community Development Agency, Building Permits (unincorporated Marin) (review-time benchmark)
- ! 1 slow or stalled nearby project within ½ mile
Closest lead: New home at 100 Black Log Rd (0.31 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:
- 86,554 sq ft (1.99 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 227 S RIDGEWOOD RD
Zoning & Land Use
RSP-0.5 — Residential Single Family Planned (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned RSP-0.5 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned RSP-0.5, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned RSP-0.5, a single-family residential zone. The lot is 86,554 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 06041C0458F, effective March 16, 2016
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,278,000 – $2,900,000 · 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
- New home at 100 Black Log Rd (Applied)0.31 mi E
In "Applied" for 10.7 yr (since Feb 22, 2016), 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).
- Remodel / interior alteration (161048) (Issued)On this parcel
Issued after 9 mo (3.3× the 83d median) — slower than 90% of remodel / interior alteration permits in Unincorporated Marin (median 83d, 90th pct 266d, n=1,054).
- Electrical / panel (142712) (Issued)On this parcel
Issued after 2.8 yr — slower than 90% of electrical / panel permits in Unincorporated Marin (median 0d, 90th pct 2d, n=3,019).
- Electrical / panel (70783) (Applied)On this parcel
Pending in review for 12.5 yr — slower than 90% of electrical / panel permits in Unincorporated Marin (median 0d, 90th pct 2d, n=3,019).
Entity-resolved builders & contractors in ½ mile: Rfw Builders (1 on parcel, 1 in ½ mi · Remodel / interior alteration); Nexus Energy (1 on parcel, 1 in ½ mi · Solar / battery storage); Ffc (1 on parcel, 1 in ½ mi · Electrical / panel); Owner Builder (26 in ½ mi · Remodel / interior alteration); Colindres And Associates (7 in ½ mi · New garage / accessory structure).
Permit & Project History on This Parcel (9 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 165291 | Solar / battery storage | Issued | Iss. Jul 31, 2020 | $35,000 | 7.15 Kw Photovoltaic & Energy Storage System |
| 161048 | Remodel / interior alteration | Issued | Iss. Mar 19, 2019 | $380,000 | Struct Rmdl Kitchen, Guest Bath, Powder, Master Suite And Relocate Laundry T.D. 7/25/18 |
| 142712 | Electrical / panel | Issued | Iss. May 27, 2014 | $1,000 | Electrical For Gate *Expired - Ltr Sent 11/15/12* Extend To 4/29/13 *Exp Ltr Sent 5/10/13 *2nd Notice Sent 6/28/13 ***Ex… |
| 70783 | Electrical / panel | Applied | App. May 15, 2014 | $1,000 | Electric For Gate |
| 142483 | Other | Issued | Iss. May 5, 2014 |