If you are interested in receiving information regarding upcoming business opportunities with Contra Costa County, please fill out the form below. No business checks, personal checks or credit cards will be accepted.It generally comes down to the buyer and seller to decide who handles it. Traditionally, in the State of California, the seller pays the transfer tax. To file an FBN in Contra Costa County follow these steps: 1. It is recommended for legibility that this form is completed online prior to printing. Call the Law Offices of Stephen M. Fuerch at (925) 463-2575 or complete our online form. We represent clients throughout Alameda and Contra Costa Counties. Contra Costa County is looking to fill an exciting opportunity for a Chief of Administrative Services I – Exempt.