Photo: Simon Upton/New York Magazine

A growing trend in Manhattan real estate is for developers to hire A-List interior designers to transform model residences in condo buildings in order to drum up buzz and help sway potential buyers by allowing them to envision what their future home could look like. Such is the case with Manhattan House – a landmark luxury condo development on the Upper East Side which features three beautiful model apartments decorated by Rita Konig, Celerie Kemble and James Huniford which are part of the building’s “Modern Collection” residences. The three sprawling apartments are equally fabulous but …