East Bay city guide

Castro Valley

Castro Valley is an unincorporated community in the hills of central Alameda County, between Hayward and the Tri-Valley, with a boulevard-centered commercial strip and hillside residential neighborhoods.

At a glance

  • Where it is: unincorporated Alameda County, along Interstate 580 and Castro Valley Boulevard.
  • Known for: Lake Chabot, canyon parks, and a long commercial boulevard rather than a traditional downtown.
  • The environment: suburban and hilly, with a semi-rural feel in the canyon areas.
  • What sets it apart: it is not a city — Alameda County provides local government and permitting.

Housing character

  • Post-war single-family homes across much of the area.
  • Hillside properties with larger lots and views.
  • Some newer developments, particularly on the eastern side.

Places within Castro Valley

Castro Valley Village
Central area along the boulevard with older homes nearby.
Palomares Hills
Eastern planned community with an HOA and shared amenities.
Proctor
Established neighborhood on the western side.
Five Canyons
Newer hillside development with views.
Crow Canyon / Cull Canyon
Semi-rural canyon areas with larger parcels.

Around town

  • Castro Valley Boulevard shops, restaurants, and the Castro Valley Marketplace.
  • Lake Chabot Regional Park, with trails, fishing, and boat rentals.
  • Cull Canyon and Don Castro regional recreation areas.
  • The Castro Valley Library and the summer street parties.
  • Quick access to both the bayside and the Tri-Valley.

Getting around

  • Castro Valley BART station.
  • Interstate 580 crosses the area and connects east to the Tri-Valley.
  • Interstate 238 connects to Interstate 880.
  • Redwood Road climbs north into the hills toward Oakland.
  • AC Transit bus service.

What to check

  • Because it is unincorporated, permitting and services go through Alameda County rather than a city — worth understanding before you remodel or build.
  • Hillside and canyon areas have wildfire designations that affect insurance availability and cost.
  • Interstate 580 noise affects nearby blocks.
  • Some canyon properties have private road, well, or septic considerations.
  • Verify current transportation service, school assignment, permit requirements, hazard information, and total housing costs for the specific address.

Nearby guides

HaywardCentral East Bay city with two BART stations, direct San Mateo Bridge access, and one of the widest housing ranges.San LeandroTwo BART stations, a walkable downtown, marina access, and period homes between Oakland and Hayward.DublinTri-Valley city with the newest housing stock in the East Bay, two BART stations, and large planned communities.OaklandEast Bay city with an urban downtown, older homes in the flats, and residential neighborhoods in the hills.