County
Verified Entry
Assessor Department
Contra Costa County Assessor's Office
Location Address
2530 Arnold Drive, Martinez, CA 94553
Contact Line
925-313-7500Overview & Services
The Contra Costa County Assessor's Office, located at 2530 Arnold Drive in Martinez, California, serves as the primary resource for property valuation and tax assessment matters within the county. Residents and businesses can obtain detailed information on property records, assessment appeals, and exemption eligibility by visiting the office or contacting staff at 925-313-7500. The office is committed to providing accurate, transparent assessments that support fair taxation and informed community planning. Open during regular business hours, the office offers both in‑person assistance and online services to accommodate a wide range of public needs.
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