Hill West Architects, formerly Goldstein Hill & West Architects, is a New York City-based architecture firm founded by Alan Goldstein, L. Stephen Hill, and David West in 2009. The co-founders are alumni of Costas Kondylis and Partners. In January 2016, Alan Goldstein announced his retirement from the eponymous firm. The firm's clients include Extell Development, The Witkoff Group, The Trump Organization, Silverstein Properties, Tishman Speyer, and the Lightstone Group. In 2014, Crain's New York Business ranked 34th on its Fast 50 list. Because of their developer and business-friendly approach, the firms architects are sometimes brought in to fix the designs of more famous and less cost-conscious rivals. For example, Hill & West designed the interiors of Herzog & de Meurons 56 Leonard Street. The firm established a subsidiary, Whitehall Interiors NYC, in 2014. The subsidiary designed the lobby renovations of The Feil Organization's 7 Penn Plaza and 488 Madison Avenue. Hill & West's projects include 221 West 29th Street, the Ashley at 400 West 63rd Street, The Aldyn at 60 Riverside Boulevard, 86 Fleet Place in Brooklyn, and 42-12 28th Street in Long Island City.