318 Joan Vista
El Sobrante 94803 · Unincorporated Contra Costa · Coordinates: 37.97566, -122.29380
Parcel & Assessor
- Lot size:
- 5,896 sq ft (0.14 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 85004
- Addresses on lot:
- 318 JOAN VISTA ST
Zoning & Land Use
R-7 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-7 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotLikely eligible
Zoned R-7, a single-family residential zone.
- SB 9: split into two lotsLikely eligible
Zoned R-7, a single-family residential zone. The lot is 5,896 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: $616,000 – $834,000 · 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 November 2024)
15 active or recent development projects (15 housing units across completed, permitted, and pipeline stages) and 86 total building permits recorded within ½ mile.
- Adds housing (ADU)9 permits (9 units)
- Additions & renovations9 permits
- Building systems55 permits
- Repairs3 permits
- Other10 permits
Developments Deserving Closer Investigation & Active Area Builders
- New home (Entitled)On this parcel
Active in "Entitled" for 20 mo (first record Mar 17, 2025) with no new permit activity recorded in 20 mo.
- New home (Entitled)On this parcel
Active in "Entitled" for 20 mo (first record Mar 17, 2025) with no new permit activity recorded in 20 mo.
- 5 new homes (Entitled)0.42 mi N
Active in "Entitled" for 8.3 yr (first record Aug 6, 2018) with no new permit activity recorded in 8.3 yr. High-impact scale (5 housing units across 0 permits).
- New home at 3135-a Keith Dr (Entitled)0.12 mi SE
Active in "Entitled" for 7.4 yr (first record Jun 24, 2019) with no new permit activity recorded in 7.4 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 2025).