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  1. Welcome to the Tax Portal


    We've collated all the information you need regarding Contra Costa taxes. Peruse rates information, view relief programs, make a payment, or contact one of our offices.
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  1. Tax Calendar

May 2023

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  1. Mon, May 29

    Closed for Memorial Day
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  1. Tax News
  1. FAQ3

    Frequently Asked Questions

    Have a question about property taxes in Contra Costa County? You are not alone. Hopefully, we have the answer you are looking for. Read more...
  2. Senior Group

    Tax Assistance for Seniors

    Depending on age and sometimes income, Seniors may qualify for certain tax assistance. Read more...
  3. Important Dates5

    Important Tax Dates

    The following schedule is intended to serve as a general guide to property owners in Contra Costa County, California. Read more...
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  1. The Seal of Contra costa County California

  1. Contact Us: Public Information Contacts   Media Inquiries   Contact Webmaster 
                         
    County Administration Building:       
    1025 Escobar Street, Martinez, CA 94553
    1st Floor:  Clerk of the Board
    2nd Floor:  Human Resources
    3rd Floor:  County Counsel
    4th Floor:  County Administration

    For all other County departments and offices, see their web pages.

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