Which fictional address does Gregory House use for his apartment in House M.D.?

Gregory House’s apartment address in House M.D. is 221B Baker Street.

The address is a direct reference to Sherlock Holmes, who famously lives at 221B Baker Street in Arthur Conan Doyle’s stories. House is modeled partly on Holmes: both characters solve difficult cases through observation and deduction, use unconventional methods, and have complicated relationships with drugs and authority.

House’s apartment is presented as being in Princeton, New Jersey, even though the address itself belongs to the Holmes tradition. The setting therefore works as an intentional character clue rather than a realistic geographical detail. The show repeatedly uses Holmes parallels in names, behavior, and story structure.

Some viewers confuse the fictional address with a nearby variant or with other famous literary addresses. The canonical Holmes-inspired address used for House is 221B Baker Street, not 221A Baker Street.