A rare opportunity to own a thoughtfully designed in-town compound just moments from Main Street. This exceptional property pairs a three-level main residence with a detached studio, storage shed, and two coveted off-street parking spaces, offering a combination of privacy, flexibility, and convenience that is rarely found in downtown Nantucket. Designed for effortless entertaining and everyday living, the outdoor spaces feature a covered porch, a fully equipped outdoor kitchen, a gas fireplace, and multiple dining and relaxing areas, creating a private retreat in the heart of town. Inside, custom millwork, refined finishes, and thoughtfully designed living spaces blend timeless craftsmanship with modern comfort. Offering multiple living spaces, exceptional outdoor amenities, and a premier in-town location just moments from the harbor, restaurants, boutiques, and galleries, 18 Mill Street presents a distinctive opportunity to enjoy Nantucket living at its finest.