Property Tax Information | Contra Costa County Assessor's Office
2530 Arnold Dr, Suite 100, Martinez, CA 94553
Eligibility
Contra Costa County homeowner/property owner
Required documents
None
Hours
Monday-Friday, 8am - 4pm
To access this service, contact:
Gus Kramer (Assessor)
925-313-7400
Voice·
Main Number
925-313-7488
Fax·
Fax
Languages
English and Spanish
Application process
Call for information (answering machine gives further information) or check website
Fees
None
Service area
Contra Costa County
Discovers and assessing all property within the County, produces and delivers an assessment roll by July 1 of each year, values all real property, audits all entities doing business in the County and valuing all taxable personal property, establishes and maintains a set of 11,000 maps for assessment purposes, delineates every parcel of land in the County and provides a public information service to assist taxpayers with questions about property ownership and assessment including proposition 60 which provides for the transfer of property tax base for senior citizens. Website allows property owners in the county to see their tax bill, assessment and other information.
Last Assured
02/24/2025
What's Here
Providing organization
Contra Costa County Assessors Office
Discovers and assessing all property within the County, produces and delivers an assessment roll by July 1 of each year, values all real property, audits all entities doing business in the County and valuing all taxable personal property, establishes and maintains a set of 11,000 maps for assessment purposes, delineates every parcel of land in the County and provides a public information service to assist taxpayers with questions about property ownership and assessment. Website allows property owners in the county to see their tax bill, assessment and other information.