6 eco-friendly homes Today's best articles Daily business briefing Solving COVID newsletter Hubbardston, Massachusetts. This 2004 four-bedroom home gets electricity from its own solar energy system and heat from a geothermal multizone hydronic system. The open-plan house has high ceilings, a granite fireplace, two sunrooms, and a gourmet kitchen with floor-to-ceiling custom cabinets. The 15.65-acre property includes fields, gardens, a subterranean greenhouse, an outdoor shower and hot tub, a two-story garage, and a blueberry patch with a 60-pound annual yield. $1,550,000. Linda Bourgeois, Coldwell Banker Realty, (978) 340-5424. Washington Crossing, Pennsylvania. LEED-certified "Sans Souci" has hot-water radiant heat, air filtration, and a cistern for water collection. The five-bedroom house stands on 6.3 acres overlooking the Delaware River canal and features a wood-burning fireplace, chef's kitchen with walk-in pantry and Amish cabinetry, main suite with balcony, child's bedroom with secret entrance, home theater, and four-season sunroom.