Below is the form used to file code enforcement complaints within the County's jurisdiction. Complete the appropriate information and click the SUBMIT button.To complete an eviction we require the original writ, Sheriff's fee, and a signed Contra Costa County Sheriff letter of instruction for eviction located above. Look up a license; file a complaint against cemeteries and related businesses. You may also call toll-free 1 (800) 669-9777 to file a complaint. You can start your own food business right at home. Contra Costa Health offers two kinds of permits for home-based food operations. 2. Can I mail in or submit a sealed bid for a property in the public auction sale? There's also a weekly farmers' market and a charming downtown area filled with local boutiques and eateries, adding to the town's ambiance. Concord. Contra Costa – 4,718. 5.