High Quality Content by WIKIPEDIA articles! London Terrace is an apartment building complex located in New York City, in the Western Chelsea section of Manhattan. It encompasses an entire city block bounded by Ninth and Tenth Avenues, West 23rd and West 24th Streets. Construction began in late 1929 of the largest apartment building in the world which contains approximately 1,700 apartments in 14 contiguous buildings between 17 and 19 stories high as well as an Olympic sized swimming pool. London Terrace was constructed by Henry Mandel Companies and the architectural firm, Farrar & Watmough.