The Mt. Agency is a multi-story office building, on whose roof two horn-like structures protrude, similar to the ones Mt.Lady has in her domino mask. On the facade there is a sign with the name of the office.
Mt. Lady decided against better judgment to put her agency in the middle of an urban area instead in the suburbs, because she needs the publicity, despite her Quirk is quite impractical to use in the city. Mt. Lady had to rebuild her own headquarters because she accidentally demolished it.