9 Inman Ave
Kentfield 94904 · Kentfield · Unincorporated Marin · Coordinates: 37.95453, -122.54122
Executive Verdict · Public-Records Synthesis
Zoned R1-B1 in Unincorporated Marin with likely ADU & SB 9 infill eligibility and zero mapped flood, fire, or fault hazard overlaps; benchmark value $2,266,000 ($1,994,000–$2,538,000).
Upsides & Opportunities
- ✓ ADU & SB 9 infill pathways screen as likely eligible
Zoned R1-B1 supports ministerial ADU/JADU review plus SB 9 both two-unit development and ministerial urban lot split on a 7,971 sq ft lot. Local precedent is active with 6 ADU permits within ¼ mile over the last 36 months.
Source: Unincorporated Marin zoning · CA Gov. Code 66314 & 65852.21
- ✓ 7 documented municipal building permits on file
On-parcel permit history is indexed through Oct 22, 2026, letting you verify roof, HVAC, electrical, or structural work against seller disclosures.
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: 0.2% annual chance flood hazard (shaded X))
all of the lot of the parcel intersects Zone X: 0.2% annual chance flood hazard (shaded X). Outside mandatory federal SFHA insurance rules, but check local drainage and finished-floor requirements.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: Accessory dwelling unit at 34 Wolfe Grade (0.29 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)
- ! Year 1 Prop 13 tax reset (~$26,509/yr at $2,266,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$2,209/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:
- 7,971 sq ft (0.18 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 9 INMAN AVE
Zoning & Land Use
R1-B1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1-B1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R1-B1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1-B1, a single-family residential zone. The lot is 7,971 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
- Not in a State-mapped fire hazard severity zone
- FEMA National Flood Hazard Layer
- Zone X: 0.2% annual chance flood hazard (shaded X) (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: $1,994,000 – $2,538,000 · 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)
18 active or recent development projects (15 housing units across completed, permitted, and pipeline stages) and 474 total building permits recorded within ½ mile.
- New construction10 permits
- Adds housing (ADU)14 permits (14 units)
- Demolition2 permits
- Additions & renovations56 permits
- Building systems316 permits
- Repairs24 permits
- Other52 permits
Developments Deserving Closer Investigation & Active Area Builders
- Accessory dwelling unit at 34 Wolfe Grade (Applied)0.29 mi E
In "Applied" for 2.8 yr (since Jan 17, 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, $750,000 declared valuation across 1 permit).
- New home at 105 Oak Ave (Issued)450 ft NW
Active in "Issued" for 4.3 yr (first record Jul 15, 2022) with no new permit activity recorded in 14 mo. High-impact scale (1 housing unit, $965,000 declared valuation across 3 permits).
- Accessory dwelling unit at 66 Hanken Dr (adu 66a) (Issued)0.48 mi NW
Active in "Issued" for 3.1 yr (first record Sep 29, 2023) with no new permit activity recorded in 2.8 yr. High-impact scale (1 housing unit, $1,000,000 declared valuation across 1 permit).
- Accessory dwelling unit at 47 Laurel Grove Ave (Applied)0.13 mi NW
In "Applied" for 5.9 yr (since Dec 28, 2020), 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: Ernest Ongaro And Sons (3 on parcel, 3 in ½ mi · Plumbing / water heater / sewer); Earthwise Energy Solutions (1 on parcel, 1 in ½ mi · Other); Abril Roofing (1 on parcel, 1 in ½ mi · Roof replacement); Maap (1 on parcel, 1 in ½ mi · Windows / doors / siding); Golden Gate Home Improvement (1 on parcel, 1 in ½ mi · Windows / doors / siding).
Permit & Project History on This Parcel (7 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B48867 | Other | Issued | Iss. Oct 22, 2026 | $16,769 | — |
| B35443 | HVAC / heat pump | Issued | Iss. Sep 18, 2023 | $17,400 | Replace furnace and ducting with new furnace and ducting and install AC and coil new — Replace Ductwork, Mechanical Appl… |
| B34502 | Windows / doors / siding | Issued | Iss. Jun 29, 2023 | $8,832 | Replace 1 front entry door in-kind with fiberglass. Replace 2 retrofit windows in-kind with vinyl & WUI glass. — Non-str… |
| B30768 | Roof replacement | Issued | Iss. Aug 18, 2022 | $10,000 | Apply polyurethane foam roof overlay on flat section — ReRoofing |
| B14079 | Windows / doors / siding | Issued | Iss. Jan 9, 2018 | $5,690 | Replace 3 windows size for size — Non-structural Door/Window Replacement |
| B11737 | Plumbing / water heater / sewer | Issued | Iss. Jan 30, 2017 | $2,900 | replace water heater — Replace Plumbing Fixtures(s) |
| B11430 | Plumbing / water heater / sewer | Issued | Iss. Nov 28, 2016 | $6,300 | replace water main using mole approx 35'. new line will be sch 80 PVC — Replace Plumbing Fixtures(s) |