4448 Appian Way
El Sobrante 94803 · Unincorporated Contra Costa · Coordinates: 37.97000, -122.30627
Parcel & Assessor
- Lot size:
- 56,628 sq ft (1.30 ac)
- Assessor use:
- Vacant Land
- Tax rate area:
- 85004
- Addresses on lot:
- 4448 APPIAN WAY
Zoning & Land Use
HE-C — Housing Element Consistency (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned HE-C (multifamily residential): state law allows ADUs where homes are allowed. On a multifamily lot the state allowance is different: ADUs in non-living space of the building, plus up to eight detached ADUs. The assessor lists the lot as vacant: an ADU needs an existing or proposed main home.
- SB 9: two homes on the lotCan't tell
Zoned HE-C (multifamily residential): we can't tell whether it counts as a single-family zone for SB 9. Housing Element Consistency: sites rezoned for housing; check the site's allowed density.
- SB 9: split into two lotsCan't tell
Zoned HE-C (multifamily residential): we can't tell whether it counts as a single-family zone for SB 9. Housing Element Consistency: sites rezoned for housing; check the site's allowed density.
Mapped Hazard Zones on This Lot
- CAL FIRE Fire Hazard Severity Zone
- Moderate Fire Hazard Severity Zone (Local Responsibility Area) (about 38% of the lot, map Mar 24, 2025)
- FEMA National Flood Hazard Layer
- Zone AE: 1% annual chance flood (Special Flood Hazard Area) (about 16% of the lot); Zone AE: regulatory floodway (Special Flood Hazard Area) (about 19% of the lot); Zone AE: 1% annual chance flood (Special Flood Hazard Area) (about 14% of the lot); Zone X: minimal flood hazard (about 50% 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: $216,000 – $292,000 · 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)
9 active or recent development projects (9 housing units across completed, permitted, and pipeline stages) and 9 total building permits recorded within ½ mile.
- Additions & renovations2 permits
- Building systems3 permits
- Other4 permits
Developments Deserving Closer Investigation & Active Area Builders
- 2 new homes (Entitled)On this parcel
Active in "Entitled" for 2.8 yr (first record Jan 22, 2024) with no new permit activity recorded in 2.8 yr.
- Balmore Court (Entitled)0.31 mi SW
Active in "Entitled" for 5.9 yr (first record Dec 14, 2020) with no new permit activity recorded in 5.9 yr. High-impact scale (33 housing units across 0 permits).
- New commercial building at 4555 Hilltop Dr (Applied)0.49 mi N
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 (Entitled)250 ft N
Active in "Entitled" for 4.9 yr (first record Dec 7, 2021) with no new permit activity recorded in 4.9 yr.
Permit & Project History on This Parcel (0 permits, 1 grouped projects)
No building permits recorded on this parcel in our dataset.
State HCD Housing Element APR records on this parcel: 1 entry (report years 2024).