15 East 90th Street

Located in the Upper East Side neighborhood of Carnegie Hill, the townhouse at 15 East 90th Street was commissioned in 1926 for noted socialite and philanthropist Emily Trevor. According to Mansion Global, Andrew Carnegie himself stayed in its ornate rooms during the renovation of his nearby home. Steps from Central Park and next door to the Cooper Hewitt museum, the landmarked 12,000-square-foot house is 26 feet wide and spans five floors that contain five bedrooms, two outdoor spaces, two gym rooms, and a steam room and sauna. Following a stem-to-stern renovation that modernized the home's infrastructure (including an elevator that serves all floors) and restored its original architecture and details, the historic townhouse is back on the market for $29,500,000.
See all five floors of this historic home