California note
Alameda County has named unincorporated communities to check first
Alameda County names seven main communities on county land. They are Ashland, Castro Valley, Cherryland, Fairview, Hayward Acres, San Lorenzo, and Sunol. County Planning also serves rural land east of Livermore, Dublin, and Pleasanton.
Use the county’s Community Locator for the exact address. A place or mailing name does not by itself show that a city serves the site. If the result says Alameda County, County Planning handles the local land-use work. That includes zoning, lot splits, plan review, and county plans.
Next, use the county zone map or Permit Portal. Keep the parcel number handy. For a project, ask the Zoning Desk which plan, zone rule, and permit path apply. For a code problem, use County Code Enforcement or its complaint form. If the locator puts the address inside a city, start with that city instead.
Official sources
Official pages
Reviewed July 27, 2026
Current rules, forms, fees, deadlines, maps, and office instructions.
Rules, forms, fees, deadlines, and office procedures can change. Check the current page before you file, pay, or rely on a date.
Connected places
Open the local directory
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