The Cherry Arms apartment building.

Apartment building [Episode #47: "Someone Down Here Hates Me"] located six blocks from the State Department [Episode #76: "The Little Black Book, Part 1"] where Maxwell Smart and, after their marriage, Agent 99 reside.

Their apartment is #86 (matching Max's agent number) despite being only one floor above ground level.

Other residents of the building at various times have been Mrs. Dawson [Episode #8: "The Day Smart Turned Chicken"], the Chief's niece Phoebe [Episode #31: "Anatomy of a Lover"]and Emil & Naomi Farkas [Episode #97: "The Farkas Fracas"].

The landlady is Mrs. Macklin [Episode #62: "Witness for the Persecution"].