RD800 Logo

RD 800 Assessment Calculator



Please enter your property parcel number (APN) and click the Submit button.
Parcel numbers are in format: xxx-xxx-xxx-x.
The information provided is your proposed annual Maintenance and Capital assessment.


Need your parcel number? Look it up on ParcelQuest (once there, accept the ParcelQuest disclaimer and proceed to the search page), or contact us at (925) 627-0009.

NOTE: ParcelQuest is a third-party site provided by Contra Costa County as a courtesy. Neither the County or RD 800 is in charge of the site's functionality. If it's not working, please try again later.