1244 Stone Valley Rd
Alamo 94507 · Unincorporated Contra Costa · Coordinates: 37.85271, -122.02438
Parcel & Assessor
- Lot size:
- 32,670 sq ft (0.75 ac)
- Assessor use:
- Single Family, 1 residence on 1 site, with or without
- Tax rate area:
- 66009
- Addresses on lot:
- 1244 A STONE VALLEY RD; 1244 STONE VALLEY RD
Zoning & Land Use
R-20 — Single Family Residential (Unincorporated Contra Costa)
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADULikely eligible
Zoned R-20 (single-family residential): state law allows ADUs where homes are allowed.
- SB 9: two homes on the lotPossible, with conditions
Zoned R-20, a single-family residential zone. FEMA regulatory floodway covers about 36% of the lot: SB 9 requires a no-rise certification.
- SB 9: split into two lotsPossible, with conditions
Zoned R-20, a single-family residential zone. The lot is 32,670 sq ft by the assessor, room for two lots of at least 1,200 sq ft, each at least 40% of the original. FEMA regulatory floodway covers about 36% of the lot: SB 9 requires a no-rise certification.
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: regulatory floodway (Special Flood Hazard Area) (about 36% of the lot); Zone X: minimal flood hazard (about 64% of the lot) · FIRM panel 06013C0432F, effective June 16, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $2,399,000 – $3,245,000 · Status: Off market
HUD Small Area FMR (ZIP 94507) · FY 2026
Studio $2,610 · 1BR $2,910 · 2BR $3,550 · 3BR $4,540 · 4BR $5,380
Nearby Activity (½ mile radius, since —)
11 active or recent development projects (13 housing units across completed, permitted, and pipeline stages) and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- 2 new homes (Entitled)480 ft SE
Active in "Entitled" for 2.1 yr (first record Oct 10, 2024) with no new permit activity recorded in 2.1 yr.
- New home (Entitled)480 ft SE
Active in "Entitled" for 3.1 yr (first record Oct 2, 2023) with no new permit activity recorded in 3.1 yr.
- New home (Entitled)510 ft NE
Active in "Entitled" for 5.5 yr (first record May 12, 2021) with no new permit activity recorded in 5.5 yr.
- 2 new homes (Entitled)0.11 mi E
Active in "Entitled" for 20 mo (first record Mar 5, 2025) with no new permit activity recorded in 20 mo.
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: 2 entries (report years 2024, 2025).