Elegant Upper East Side Federal Townhouse - 20 Feet Wide with Rare 20-Foot Forecourt Tucked along a picturesque, tree-lined block near Gracie Mansion, this 20-foot-wide Federal-style townhouse offers a rare blend of historic grandeur, architectural distinction, and future potential in the heart of the Upper East Side. Approached through an ivy-covered gated front court, the home welcomes you through a classic high stoop crowned by a pillared portico, setting the tone for the elegance that unfolds inside. Windows on three exposures fill the residence with exceptional natural light-an uncommon luxury for Manhattan townhouses. At the center of the home is a breathtaking 20' x 20' skylit atelier-style extension with soaring 14-foot ceilings, creating a dramatic living and entertaining space originally designed by renowned architect Michael Helm. The home's gracious layout includes a double parlor, an octagonal formal dining room comfortably seating 12, and expansive entertaining spaces that flow seamlessly to the landscaped back garden-perfect for hosting gatherings of up to 100 guests. Spanning four full stories, the property is currently configured as a legal three-family residence. However, it easily functions as an elegant single-family home with 6-8 bedrooms, offering flexibility for a variety of lifestyles, ensuring comfort while preserving the home's historic character. A rare 20-foot forecourt enhances privacy and scale, while the property's zoning allows for potential expansion up, presenting a compelling opportunity for customization, investment, or future development. Moments from Carl Schurz Park, the East River Promenade, and some of the neighborhood's most beloved dining destinations, this extraordinary Yorkville townhouse offers the perfect balance of historic charm, modern comfort, and long-term value-an exceptional offering in one of Manhattan's most coveted enclaves.