Assessor Paul D. Petersen

Maricopa County Assessor's Office


The Assessor annually notices and administers over 1.7 million real and personal property parcels/accounts with full cash value of more than $475 billion in 2017. Please refer to our News/Press Release page for important information from the Assessors office. This site is designed to serve the public with a variety of informational items. Please spend some time browsing the site to see all of the different pages and options available to the public. We are committed to continuing to improve and upgrade this site. If you have comments or questions about the information which is available please contact the Maricopa County S.T.A.R. Center at 602-506-3406 or contact us using this form.

For a list of changes between our old site and our new site, be sure to check out the "What's New" page. Also, be sure to read the "Search Help" page for a primer on how to use our new search engine.

Paul Petersen, (Assessor), Sallie Clark, (President of the National Association of Counties), and Tironda Dixson (Residential Manager) celebrating the Maricopa County Assessor's Office Achievement Award at the 2016 NACo Conference.

Paul Petersen, (Assessor) and Tim Boncoskey, (Chief Deputy), celebrating Maricopa County, and Arizona winning, for the first time, the IAAO Virginia Cup.

Welcome (English)

Who are Appraisers?



What does the Assessor do?

  • The Assessor has the following basic responsibilities:

    • Locates and identifies all taxable property in Maricopa County and further identifies the ownership.
    • Establishes a value for all property subject to property taxation.
    • Lists the values of all property on the assessment roll.
    • Apply all legal exemptions.
  • The Assessor does not:

    • Compute property tax bills.
    • Collect property taxes.
    • Establish property tax laws.
    • Set rules by which property is appraised.