18540 Greenridge Ct
Castro Valley 94552 · Castro Valley · Unincorporated Alameda County · Coordinates: 37.71725, -122.04680
Parcel & Assessor
- Lot size:
- 12,723 sq ft (0.29 ac)
- Assessor use:
- 2 units, SFR with detached accessory dwelling unit
- Tax rate area:
- 54
- Addresses on lot:
- 18540 GREENRIDGE CT
Zoning & Land Use
No published city zoning district at parcel centroid.
State Housing Pathways Screen (ADU & SB 9)
- ADU or junior ADUCan't tell
We don't have a zoning map for Unincorporated Alameda County.
- SB 9: two homes on the lotCan't tell
We don't have a zoning map for Unincorporated Alameda County.
- SB 9: split into two lotsCan't tell
We don't have a zoning map for Unincorporated Alameda County.
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 06001C0285G, effective August 3, 2009
- CGS Alquist-Priolo Earthquake Fault Zone
- Not in an Alquist-Priolo Earthquake Fault Zone
Surrounding Rent & Value Benchmarks (Public Records)
Range: $1,384,000 – $1,762,000 · Status: Off market
HUD Small Area FMR (ZIP 94552) · FY 2026
Studio $2,460 · 1BR $2,740 · 2BR $3,340 · 3BR $4,270 · 4BR $5,060
Nearby Activity (½ mile radius, since —)
0 active or recent development projects and 0 total building permits recorded within ½ mile.
Developments Deserving Closer Investigation & Active Area Builders
- New home (Issued)On this parcel
Active in "Issued" for 4.9 yr (first record Dec 17, 2021) with no new permit activity recorded in 4.9 yr.
- legalizing an adu? (Issued)0.16 mi S
Active in "Issued" for 4.4 yr (first record Jun 15, 2022) with no new permit activity recorded in 4.4 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 2021).