Download and complete one form per permit for each job site. The form is in PDF format, can be filled out electronically and saved.Official Forms for Viewing and Downloading. Finally, review your application before submission to ensure all sections are complete. We have various applications and forms available on our web site for your convenience. Click on New Document and choose the file importing option: upload Contra costa credentialing application form from your device, the cloud, or a protected link. Your Registration Code is a unique code created for each vendor number and tenant number. You'll need your tenant number or vendor number. How to fill out the Contra Costa County Building Permit Application? Local Court Forms Forms designed for use in Contra Costa County.