Contra Costa County Assessor's Office in Contra Costa County, California

About Contra Costa County Assessor's Office

The Contra Costa County Assessor's Office, located in Martinez, California, determines the value of all taxable property in Contra Costa County, CA. Taxable property includes land and commercial properties, often referred to as real property or real estate, and fixed assets owned by businesses, often referred to as personal property. Property assessments performed by the Assessor are used to determine the Contra Costa County property taxes owed by individual taxpayers.

• Contra Costa County, CA property tax assessments
• Property tax appeals and reassessments
• Paying property tax bills and due dates
• Property tax rates and tax roll
• Contra Costa County GIS maps, property maps, and plat maps
• Property records and deeds in Contra Costa County