838 Marin Rd
El Sobrante 94803 · Unincorporated Contra Costa · Coordinates: 37.98117, -122.30464
Parcel & Assessor
- Lot size:
- 8,165 sq ft (0.19 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 85004
- Addresses on lot:
- 838 MARIN RD
Zoning & Land Use
R-6 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-6 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-6, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-6, a single-family residential zone. The lot is 8,165 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: minimal flood hazard (all of the lot) · FIRM panel 06013C0231G, effective March 21, 2017
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $632,000 – $856,000 · Status: Off market
HUD Small Area FMR (ZIP 94803) · FY 2026
Studio $2,020 · 1BR $2,240 · 2BR $2,740 · 3BR $3,500 · 4BR $4,150
Nearby Activity (½ mile radius, since October 2024)
15 active or recent development projects (14 housing units across completed, permitted, and pipeline stages) and 25 total building permits recorded within ½ mile.
- New construction1 permit
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)On this parcel
Active in "Entitled" for 2.1 yr (first record Oct 7, 2024) with no new permit activity recorded in 2.1 yr.
- New commercial building at 4555 Hilltop Dr (Applied)0.41 mi SW
Active in "Applied" for 2 yr (first record Oct 31, 2024) with no new permit activity recorded in 2 yr. High-impact scale ($2,006,000 declared valuation across 1 permit).
- New home (Issued)110 ft NE
Active in "Issued" for 4 yr (first record Nov 3, 2022) with no new permit activity recorded in 4 yr.
- New home (Entitled)110 ft NE
Active in "Entitled" for 4 yr (first record Nov 3, 2022) with no new permit activity recorded in 4 yr.
Permit & Project History on This Parcel (0 permits, 2 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 2 entries (report years 2024, 2025).