Known as the Sudbury Steel House, this unique property is located at the end of a raised earthen driveway that stretches from Lincoln Lane to the Sudbury River. The home has a steel frame, steel skin, and a steel roof, which is part of the builder's vision for an environmentally friendly home. Inside, the home has seven levels linked by a floating stairwell and offers fantastic views of the Great Meadows Wildlife Refuge. This home sits on nearly four acres, has three full and one partial bath, four bedrooms, a Juliet balcony, and is listed at $1.45 million. Listing broker Karen Paradise is planning an open house on May 4 from 1:30 p.m. to 4 p.m.