THE PLAZA HOTEL Five-Star Historic Luxury Hotel Fifth Avenue & 59th Street, Manhattan Stonehill & Taylor, in the ongoing role of Owner's Representative, has supervised a masterplan of retrofit projects to update this world-renowned hotel, many designed by the firm, some by other professionals. Projects have included renovations to restaurants and lobbies, facade repair and weatherproofing, infrastructural upgrades, and the creation of a new multi-floor spa facility.