Usually, empty lots will not have an address record associated with it . However, if there is a DCRA approved address for the lot, there should be an address record whose status is 'assigned'. If there was a building, that existed on the lot between 1999 to last year, and that building was demolished then it is highly likely that there will be an address record whose status is 'RETIRE'. The 'RETIRE' status indicates that the building is demolished and / or that the address is no longer in existence.
(Image from Google StreetView)