Solving Joint Ownership Problems in Contra Costa County. In a partition lawsuit, there are generally four different steps.First, the court determines each party's ownership interests. Partition Attorney in Contra Costa County. Ending Co-Ownership Disputes in Contra Costa County. Super Lawyers Rated Partition Attorneys in Walnut Creek. The following is a list of some documents that may be recorded if they meet all requirements, and a description or definition of each document. Professional representation in joint ownership matters. I am a land surveyor with a project in Contra Costa County. Where are the checklist for filing Maps, and what are the fees associated with map submittals?