This Courthouse serves the former Mt. Diablo Judicial District and the communities of Avon, Clayton, Clyde, Concord, Martinez, Pacheco and Pleasant Hill. People can file small claim, traffic, landlord/tenant and domestic violence restraining order cases. Clerks accept payment of traffic fines, fees and sell court forms. There is a drop box on the left side of the courtroom door for payments or correspondence. This courthouse also has "Night Court."