Location guide · Contra Costa County, CA
Find a property owner in Contra Costa County, California
Looking up who owns a Contra Costa County property — the county seat is Martinez — takes one of two starting points: the official county property appraiser or assessor website, or a single-screen owner-data tool that resolves the address directly to the verified owner with phones (DNC flagged) and emails. For a single one-off lookup, the county records site is the no-charge path. For a list of Contra Costa County addresses, a tool that handles every address in one pass is materially faster.
Try the free address lookup on any Contra Costa County property
Paste any address in Contra Costa County into our free address lookup tool and see the verified owner name plus phones and emails returned in seconds. No account, no card.
Look up any Contra Costa County address
What's on a Contra Costa County property record
- The recorded owner name (person or LLC)
- The mailing address (often different from the property location for absentee owners)
- Assessed value and tax history
- Property characteristics (lot size, year built where applicable, square footage)
- A link to the recorded deed in most counties
The county portal does not include the owner's phone number or email. To actually reach them, run the owner name + mailing address through an owner-data tool, or check consumer-records sites manually for one-offs.
Common questions
How do I find the owner of a property in Contra Costa County?
The Contra Costa County property appraiser or assessor website publishes the recorded owner name and mailing address for every property in the county at no charge. For a list of addresses, an owner-data tool resolves each one directly to the verified owner with phones (DNC flagged) and emails.
Where do I find Contra Costa County property records?
Through the official Contra Costa County tax assessor or property appraiser website. Search the county name + "property records" or "tax assessor" to find the official portal. Records include the recorded owner, mailing address, assessed value, tax history, and a link to the recorded deed in most counties.
Is it legal to look up property owners in Contra Costa County?
Yes — property ownership records are public information in every California county. Contacting the owner is governed by the federal TCPA, the national Do Not Call registry, and any California-specific layers. Use a tool that flags DNC and TCPA-litigator records before outbound contact.