How long do property title insurance policies last?

If you purchased the policy, it will last indefinitely as of the purchase date as long as you own the property.  However, any liens placed on the property later will not be covered. 

For example, if you did not pay a remodeling contractor who did work on the home, and the contractor placed a lien on your property, that would not be covered.  Other prior features of the property, such as an existing easement, would be covered.