couture house

couture house (plural couture houses)

1. An official designation for a haute couture brand.
   • 2018 June 30, Vanessa Friedman, “Why We Cover High Fashion”, in The New York Times‎^[1], →ISSN:

     To qualify as a couture house, which is an official designation like champagne, a brand must maintain an atelier of a certain number of artisans full time and produce a specific number of garments twice a year for a show.