For most closings, a survey is required to obtain title insurance. One common exception is the purchase of an individual condominium unit. Mortgage lenders require a property survey before they will approve a loan. Even if a survey has been done in the past, lenders typically require a recent survey, generally done within six months of the closing date. An up-to-date property survey will reflect any recent changes to the property, such as the addition of a fence or driveway.