A 9,000-square-foot home that was the site of the 2010 Hampton Designer Showhouse closed Friday for $4.925 million. The Sag Harbor home was last listed for $5.5 million. The postmodern-style house has seven bedrooms and nine bathrooms as well as a 50-foot pool with a hot tub and a movie theater. The property is 4.7 acres next to a reserve. Frank Bodenchak, the owner and developer, listed the house with Saunders & Associates, where he also is an agent. Traci Robinson of The Corcoran Group found the buyer.