6 November 2014 Last updated at 10:36 GMT
Known as Ak Saray (White Palace), it was built on a forested hilltop on the edge of the capital Ankara, on more than 150,000 sq m (1.6m sq ft) of land.
BBC News takes a quick look inside.
Video produced by Michael Hirst, with photographs from AP, AFP, Reuters and Getty Images
A controversial new 1,000-room palace built for Turkish President Recep Tayyip Erdogan will cost about £385m ($615m) - nearly twice the previous estimate, Turkish officials say.