The following information is for general informational purposes only and should not be considered legal advice. What type of document can be recorded?What Is a Public Record? Contra Costa County County Clerk Recorder - Kristin B. Connelly. Documentary transfer tax (DTT) is a tax collected when an interest in real property is conveyed. This page concerns records requests in non-Criminal cases. Information on Criminal court records is available here. This is a list of the National Register of Historic Places listings in Contra Costa County, California. Location of Contra Costa County in California. The total cost of closing home sellers in California can be up to 6-10 percent of the total sales price.