Official Forms for Viewing and Downloading. The County Clerk-Recorder's Office maintains real property records back to 1849.You may search our online index back to 1986. A list of tax-defaulted properties to be offered for sale is available on the Tax Collector's website at least 21 days prior to the tax sale. We buy homes in Contra Costa in any condition for cash, in as few as seven days. The following information is for general informational purposes only and should not be considered legal advice. Browse Contra Costa County, CA real estate. We are a team of experienced, professional real estate agents here to help you sell your home in Walnut Creek. Discover Your Ideal Home in San Lorenzo's Ashland Area!