showhouse

From show +‎ house.

showhouse (plural showhouses)

1. A house open to the public as an exhibition of architecture, furnishing, etc.
   • 2007 July 20, Wendy Moonan, “Chinese Porcelain With a French Twist”, in New York Times‎^[1]:

     More than 20 interior designers and decorative artists are participating in this year’s showhouse, a new, 10,000-square-foot shingle-style house built by George Gavalas of Bridgehampton.

• house show