One Kemble Street and Civil Aviation Authority House (CAA House) originally known jointly as Space House is an architecturally notable building off Kingsway in the London Borough of Camden. It is a grade II listed building with Historic England. Like nearby Centre Point it was built for the developer Harry Hyams as part of the 1960s commercial property boom and kept empty for several years after completion. The building was designed by George Marsh a partner in Richard Seifert's architectural firm for Oldham Estates the vehicle for the developer Harry Hyams and built between 1964 and 1968 by Robert McAlpine and Sons. Marsh had also designed the nearby Centre Point also for Hyams. The consulting engineers were C.J. Pell & Partners.