Assessor

Contra Costa County, CA

Official Website: http://co.contra-costa.ca.us

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.

Forms & Documents

Browse all Assessor government forms

1 - 20 of 28 forms

Form Title Topics
2019-2020 Personal Property Valuation Guidelines
2022-2023 Personal Property Valuation Guidelines
Advisory Council Application Form
Affidavit for 4% Assessment of Certain Vessels
Affidavit of Cotenant Residency
Americans with Disability Act Access Request and Complaint Form
Cancellation of a Homeowners' Exemption
Change in Ownership Statement - Death of Property Owner
Change of Address Form
Claim for Base Year Value Transfer - Acquisition by Public Entity
Claim for Intercounty Transfer of Base Year Value to Replacement Property from Principal Residence Damaged or Destroyed in a Governor-Declared Disaster
Claim for Reassessment Exclusion for Transfer Between Parent and Child
Claim for Reassessment Exclusion for Transfer Between Parent and Child (For Transfer Dates of 2/15/2021 and Prior) (PDF)
Claim for Reassessment Exclusion for Transfer from Grandparent to Grandchild
Claim for Reassessment Exclusion for Transfer from Grandparent to Grandchild (For Transfer Dates of 2/15/2021 and Prior)
Claim for Reassessment Reversal for Local Registered Domestic Partners
Claim for Seismic Safety Construction Exclusion from Assessment
Claim of Person(s) At Least 55 Years of Age for Transfer of Base Year Value Replacement Dwelling (Intracounty and Intercounty, When Applicable
Claim of Person(s) At Least 55 Years of Age for Transfer of Base Year Value Replacement Dwelling (Intracounty and Intercounty, When Applicable) (For Transfer Dates of 3/31/2021 and Prior) (PDF)
Disabled Person's Claim for Exclusion of New Construction

Contact Information & Office Locations

1 contact point

Main Office

Address:
2530 Arnold Dr
Suite 100
Martinez, CA 94553

Phone numbers:
  • (925) 313-7400
Fax numbers:
  • (925) 313-7488
Hours of operation:
  • Monday through Friday 8:00am to 4:00pm

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