Welcome to One Carnegie Hill – Your New Home in the Sky! Come live in one of Manhattan’s best full-service buildings — One Carnegie Hill. This modern high-rise was built in 2005 by The Related Companies and designed by HLW International. It is a condop, which means you get the flexibility of a condo with the support of a co-op. Unit 25B is a bright and open studio with a cozy sleeping alcove. Yo...