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Property and assessment

Assessed values, parcels and assessment appeals.

Property taxation, recorded documents and zoning involve different agencies.

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3 reviewed links · Contra Costa

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Contra Costa, California

County context for browsing. Agency service areas may differ.

Maps and property information — CCMAP and ParcelQuest (opens in a new tab)

County instructions for parcel data, Assessor maps and two query options. The county does not display property-owner names online. Counter copies and other services can have separate fees.

Office guide →
Source & saved evidence

Contra Costa County official service / referred provider · Contra Costa — property query (opens in a new tab)

County property lookup — Maps and property information — CCMAP and ParcelQuest

The County’s portal for on-line property information is CCMAP.

Agent source review: October 15, 2026 · Snapshot 7a6cff73bbfad998

Assessment appeal application and county filing instructions (opens in a new tab)

Contra Costa County appeal filing instructions, the $40 check requirement and separate assessment-appeals contact. The appeals office is independent of the Assessor.

Office guide →
Source & saved evidence

Contra Costa County · Contra Costa — assessment appeals information (opens in a new tab)

Assessment appeals — Assessment appeal application and county filing instructions

Assessment Appeals is separate from the Assessor's Office

Agent source review: October 15, 2026 · Snapshot fb033dad599582b2

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