The latest status of houses damaged in the war Alireza Zakani, Mayor of Tehran: The building files have been classified in 4 levels, and the processing of files in level A and B has mostly been completed. Of course there can be a limited number of people who have not yet applied for tracking. Grade 3 buildings that need renovation and Grade 4 buildings that need to be demolished and rebuilt need at least two years to complete the process, and accompanying steps are underway.