The Only 20'-Wide Single Family House with Elevator West of Third Avenue at or under $10MM. Welcome to 166 East 64th Street, an elegant Neo-classical townhouse flooded with lighton a picturesque, tree-lined block. This 20'-wide, 5-story townhouse with elevator to 5 levels presents 6,800 square feet of expansive interior space, including 1,200 square feet below ground, and 4 sunny south-facing outdoor spaces with a total of 1,635 exterior square feet. In addition, it has 3,614 squarefeet of unused FAR (air rights) which can be used as-of-right as the house is located just outside the Upper East Side Historic District. 166 East 64 provides 12 rooms, 4 outdoor spaces, 4 wood-burning fireplaces, 5 bedrooms, 3 fullbaths, 3 half baths, and elevator. Among the standout features of the house are: The sprawling garden level which invites you from the entrance vestibule through the foyer, the kitchen, family room and dining room out to the patio and a nearly 650 square-foot lush garden with seating and a koi pond. Ascend to the parlor floor, where 12.5' high ceilings elevate the art of entertaining. The spacious layout spans over 60 feet, providing an airy connection from the livingroom through thelibrary and onto the balcony overlooking the garden. Additionally, 2 wood-burning fireplaces on this level set the stage for intimate gatherings or peaceful nights at home. The crowning jewel awaits on the top floor-an escape reminiscent of "An American in Paris." This luxurious penthouse space features an all-glass south-facing wall, opening directly to a planted 500 square-foot terrace. Inviting in an abundance of natural light and a serene connection to the outdoors, the penthouse space is versatile in use, perfect for an artist's studio, office, or additional bedroom. Inquire for a private showing.