Discover an energy-efficient three-story custom home on 1.55 acres of woodland retreat. This envelope-style home uses a double-wall design creating an insulated airspace, reducing heat loss in winter and heat gain in summer for consistent indoor comfort and lower energy costs. Large custom windows fill the open-concept living area with natural light highlighting a cozy wood stove. The kitchen features custom built-ins, pantry, dining area, and generous storage. Lower-level master suite offers his & hers sinks, soaking tub, separate shower, and in-suite laundry. Upper level provides additional bedroom, family room, office, and full bath. Dedicated custom home office is perfect for remote work. Exterior includes built-in outdoor storage, garage, nearby trails and conservation. 3-bedroom septic allows future expansion. Mini splits in a few rooms. Ideally located near Upton Center, I-495 & Mass Pike-schedule a showing today!