When an existing structure is found by the commissioner to be safe, or has been made safe pursuant to an order of the commissioner, or a new structure has been constructed to the satisfaction of the commissioner under a properly issued permit, the commissioner shall issue a certificate to the owner approving the structure but subject to such terms and conditions, if any, as the commissioner deems necessary for the protection of life and property. Such certificate shall be filed by the owner in the land records in the town or towns in which such structure is located.