25 Southside Lane captures one of the most spectacular water views in Blue Hill. This 2021-built net-zero residence is complemented by multiple architecturally distinctive outbuildings, extending the property's living spaces. Within easy walking distance of the Blue Hill Co-op, Bay School, Harbor School, medical services, YMCA, and local restaurants offering both convenience and serenity. The sweeping panorama encompasses Blue Hill Harbor and Blue Hill Bay, with the distant mountains of Mount Desert Island. The main residence reflects a meticulous commitment to energy efficiency and craftsmanship. Every system and surface was designed to promote all season comfort, sustainability, and low maintenance. Heating and cooling are powered entirely by electric heat pumps, while the rooftop solar array, featuring sleek, all-black American-made panels, produces surplus electricity, even when charging a fully electric vehicle. A state-of-the-art air exchange system ensures year-round fresh air circulation, creating a remarkably healthy and comfortable indoor environment. The finished lower-level walkout includes a bedroom, an accessible bath featuring a Toto Washlet, heated towel bars, and a laundry area. Upstairs, an additional bedroom, an office/exercise loft, and extra space above the finished garage provide flexibility for guests or creative pursuits. The property's outbuildings enhance its versatility and appeal: GUEST COTTAGE - A charming retreat with a kitchen-dining area, deck, and full basement. SCREENED SALTBOX HOUSE-A delightful multi-use structure overlooking the water, ideal as a sleeping porch, studio, or serene retreat. TIMBER FRAME BARN is ideal for a workshop, studio, or additional garage. The site includes exceptional stonework. The property is a rare combination of exceptional craftsmanship, sustainable design, and breathtaking coastal views, a truly turnkey property ready to enjoy in all seasons.