Welcome to the Contra Costa County Assessor’s Office. The County Assessor is an elected official, and is governed by the California Constitution, the laws passed by the Legislature, and the rules adopted by the State Board of Equalization.
PLEASE BE ADVISED THAT THE CONTRA COSTA COUNTY ASSESSOR’S OFFICE IS CLOSED TO THE PUBLIC UNTIL FURTHER NOTICE, BECAUSE THE SERVICE IS NON-ESSENTIAL DURING THIS EMERGENCY AND WORKERS WILL BE DEPLOYED ELSEWHERE IN THE COUNTY.
FOR MORE COUNTYWIDE INFORMATION RELATED TO COVID-19 (NOVEL CORONAVIRUS) PLEASE VISIT THE COUNTY’S WEBPAGE AT WWW.CONTRACOSTA.CA.GOV.
NEW! FORM 571-L FILING DEADLINE EXTENDED: By the Executive Order of Governor Gavin Newsom, the filing deadline for Form 571-L (Business Property Statement) is extended to June 1, 2020 without penalty.
For assistance with filing, you may contact our Business Division by phone at (925) 313-7610 or by email at firstname.lastname@example.org.