To set up a new business account to file your Business Property Statement, please call (925) 313-7600 for more information. Official Forms for Viewing and Downloading.Total of 103 forms are available for Contra Costa County for 2024. Forms ; ADOPT-230, Adoption Expenses ; ADOPT-310, Contact After Adoption Agreement ; ADOPT-315, Request to: Enforce, Change, End Contact After Adoption Agreement. The PCOR is near the bottom of the page under "Change in Ownership Forms". In this post, we break down all the details. When Are Property Taxes Due in Contra Costa County? Any time owners make a change to the title of real estate, they must record a deed with the County Recorder. This Step-by-Step guide outlines the requirements. If you're considering purchasing property in the area, it's important to learn about Contra Costa County property taxes.