Adding 10 stories on top of the 20-story structure that sits at the corner of Fifth Avenue and 53rd Street, IMEG provided mechanical, electrical, plumbing, and fire protection design services for the 100,000-sf office-to-condominium conversion. Known as the Dorothy Gray Building and once the former headquarters of House of Gucci, the new, 5-star hotel-serviced residential units begin on the sixth floor. The new condominium portion contains four duplexes, a rooftop pool, and a lounge on the 25th floor, while the retail level remains the same.