Need to file a mechanics lien in Contra Costa County? Here's what you need to know to record your lien with the Contra Costa County Recorder.A judgment lien can be attached to the debtor's real estate -- meaning a house, condo, land, or similar kind of property interest. Filing a judgment lien on a property can help you collect a debt, but a number of factors can affect the outcome. Read on to find out. Welcome to the Contra Costa County Clerk-Recorder's Official Records Index. To obtain a judgment lien, you must first record the judgment with the court of common pleas in the county where the debtor owns property. Your first step as a judgment creditor is to convert your verdict or other court determination declaring both parties' rights and obligations into a judgment. To obtain a judgment lien, you must first record the judgment with the court of common pleas in the county where the debtor owns property. Fill in the blank Notice of Mechanics Lien form formatted to comply with all California recording and content requirements.