Parcel Context · Public-Records Property BriefAPN 164-331-03
2535 A Opalstone Ter
San Rafael 94903 · Marinwood · Unincorporated Marin · Coordinates: 38.03522, -122.54647
Parcel & Assessor
- Lot size:
- 17,163 sq ft (0.39 ac)
- Assessor use:
- Single-Resid. - Improved
- Addresses on lot:
- 2535A OPALSTONE TER; 2535 OPALSTONE TER
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 lotLikely eligible
Zoned R1, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R1, a single-family residential zone. The lot is 17,163 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
- High Fire Hazard Severity Zone (Local Responsibility Area) (all of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone X: minimal flood hazard (all of the lot) · FIRM panel 06041C0291D, effective May 4, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
HUD Small Area FMR (ZIP 94903) · FY 2026
Studio $2,880 · 1BR $3,450 · 2BR $4,180 · 3BR $5,340 · 4BR $5,530
ACS 2020–2024 Median Gross Rent (Marinwood):$3,500+ Source: ACS 2020–2024 5-year estimates. Geography: Marinwood.
ACS 2020–2024 Median Gross Rent (ZIP 94903):$2,982±$267 Source: ACS 2020–2024 5-year estimates. Geography: San Rafael.
Zillow Home Value Index (ZIP 94903, September 2026):$1,250,063
ACS 2020–2024 Median Home Value (Marinwood):$1,267,000±$76,000 Source: ACS 2020–2024 5-year estimates. Geography: Marinwood.
ACS 2020–2024 Median Home Value (ZIP 94903):$1,222,000±$55,800 Source: ACS 2020–2024 5-year estimates. Geography: San Rafael.
Nearby Activity (½ mile radius, since October 2024)
8 active or recent development projects (130 housing units across completed, permitted, and pipeline stages) and 559 total building permits recorded within ½ mile.
- New construction16 permits (1 units)
- Adds housing (ADU)4 permits (4 units)
- Demolition3 permits
- Additions & renovations22 permits
- Building systems416 permits
- Repairs46 permits
- Other52 permits
Permit & Project History on This Parcel (4 permits, 1 grouped projects)
Accessory dwelling unit at 2535 Opalstone Ter ( A D U 2535 A)Stage: Issued · 1 units · $116,456 declared valuation · Last record Sep 30, 2026
| Record # | Category | Status | Applied / Issued | Valuation | Description |
|---|---|---|---|---|---|
| 182535 | Accessory dwelling unit (new or conversion) | Issued | Iss. Sep 30, 2026 | $116,456 | New Detached A D U With Deck |
| 88674 | Electrical / panel | Applied | App. Jul 20, 2021 | $500 | Main Panel Upgrade **Created For Refund** |
| B26352 | Electrical / panel | Issued | Iss. Jul 19, 2021 | $500 | Electrical panel service upgrade — Service Upgrade |
| 168642 | Windows / doors / siding | Issued | Iss. Jun 28, 2021 | $10,000 | Siding Repair & New Window |