152 Auburn St
San Rafael 94901 · California Park · Unincorporated Marin · Coordinates: 37.95714, -122.51306
Executive Verdict · Public-Records Synthesis
Zoned R1 in Unincorporated Marin with likely ministerial ADU eligibility and mapped FEMA AE flood due diligence; benchmark value $1,395,000 ($1,228,000–$1,562,000).
Upsides & Opportunities
- ✓ Ministerial ADU / JADU pathway likely eligible
Zone R1 allows residential use qualifying for ministerial ADU review under state law (4 ADU permits permitted within ¼ mile in 36 months).
Source: Unincorporated Marin zoning · CA Gov. Code 66314
- ✓ 3 documented municipal building permits on file
On-parcel permit history is indexed through Oct 16, 2025, 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)
Watchouts & Due Diligence
- ! FEMA Special Flood Hazard Area (AE, about 1% of the lot of lot)
Zone AE: 1% annual chance flood (Special Flood Hazard Area) overlaps this parcel. Expect mandatory flood insurance for federally backed loans and floodplain elevation/mitigation rules for new units or SB 9 applications.
Source: FEMA National Flood Hazard Layer (parcel polygon)
- ! 6 slow or stalled nearby projects within ½ mile
Closest lead: 79 new homes at 0 Auburn St & Woodland Ave (0.14 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 (~$16,493/yr at $1,395,000)
Sale triggers reassessment to 1.00% base + ~0.15% voter debt (~$1,374/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:
- 9,017 sq ft (0.21 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 152 AUBURN ST
Zoning & Land Use
R1 — Residential Single Family (Unincorporated Marin)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R1 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned R1, a single-family residential zone. FEMA Special Flood Hazard Area (Zone AE) covers about 1% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
- SB 9: split into two lotsPossible, with conditions
Zoned R1, a single-family residential zone. The lot is 9,017 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. FEMA Special Flood Hazard Area (Zone AE) covers about 1% of the lot: the project must meet the National Flood Insurance Program floodplain standards, or the lot needs a map revision.
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 AE: 1% annual chance flood (Special Flood Hazard Area) (about 1% of the lot); Zone X: 0.2% annual chance flood hazard (shaded X) (about 3% of the lot); Zone X: minimal flood hazard (about 95% of the lot) · FIRM panel 06041C0459F, 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: $1,228,000 – $1,562,000 · Status: Off market
HUD Small Area FMR (ZIP 94901) · FY 2026
Studio $2,150 · 1BR $2,580 · 2BR $3,120 · 3BR $3,990 · 4BR $4,130
Nearby Activity (½ mile radius, since November 2024)
9 active or recent development projects (86 housing units across completed, permitted, and pipeline stages) and 64 total building permits recorded within ½ mile.
- New construction18 permits
- Adds housing (ADU)5 permits (5 units)
- Additions & renovations6 permits
- Building systems24 permits
- Repairs3 permits
- Other8 permits
Developments Deserving Closer Investigation & Active Area Builders
- 79 new homes at 0 Auburn St & Woodland Ave (Applied)0.14 mi NE
In "Applied" for 23 mo (since Dec 18, 2024), exceeding the 292d median and 313d 90th percentile for new multifamily / condos / mixed-use permits in Unincorporated Marin (n=21). High-impact scale (79 housing units, 16 deed-restricted affordable across 16 permits).
- Demolition at 202 Auburn St (Applied)240 ft SE
In "Applied" for 4.2 yr (since Sep 14, 2022), exceeding the 55d median and 261d 90th percentile for demolition permits in Unincorporated Marin (n=130).
- Accessory dwelling unit at 134 Orange St (Applied)420 ft NW
In "Applied" for 5.2 yr (since Sep 8, 2021), exceeding the 253d median and 686d 90th percentile for new single-family home permits in Unincorporated Marin (n=121).
- New home (Entitled)0.18 mi N
In "Entitled" for 6.2 yr (since Sep 11, 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: All Bay Sewer (2 on parcel, 2 in ½ mi · Plumbing / water heater / sewer); Raven Heating And Air Conditioning (1 on parcel, 1 in ½ mi · HVAC / heat pump); Owner Builder (14 in ½ mi · Remodel / interior alteration); Owner (5 in ½ mi · Remodel / interior alteration); Glenns Home And Commercial (2 in ½ mi · Remodel / interior alteration).
Permit & Project History on This Parcel (3 permits, 0 grouped projects)
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| B44404 | HVAC / heat pump | Issued | Iss. Oct 16, 2025 | $15,300 | Replace central heating furnace and ductwork — Replace Ductwork, Replace Mechanical Appliance |
| B41996 | Plumbing / water heater / sewer | Issued | Iss. May 6, 2025 | $2,500 | Installation of 1” Schedule 80 waterline from foundation exit to meter located near edge street (not the main) up to 55L… |
| B36335 | Plumbing / water heater / sewer | Issued | Iss. Dec 13, 2023 | $2,500 | Installation of 1” Schedule 80 waterline from foundation exit to meter located near edge street (not the main) up to 55L… |