Contact the Maricopa County Assessor's Office by calling 602-506-3406. The Assessor's office is open Monday through Friday from 8 a.m. to 5 p.m, as of 2015.
Contact the Maricopa County Assessor's Office online by completing the feedback form on its website. Provide a first name, last name and email address, and then enter the question or comment. The Maricopa County Assessor's Office mailing address is at 301 West Jefferson Street, Phoenix, AZ 85003.
The Maricopa County Assessor as of 2015 is Paul D. Peterson. An assessor's responsibilities include listing values of property on the assessment roll, applying legal exemptions and establishing value for property subject to property taxation.