This is a rare opportunity to own a beautifully preserved and thoughtfully updated classic modern home designed by renowned architect Marvin DeWinter, who also designed the Grand Rapids Ford Museum. This one-of-a-kind waterfront residence is both a true architectural masterpiece and an exceptionally livable home located within the City of Grandville. The impressive living room is filled with character, featuring soaring lofted ceilings, massive windows, a wood-burning fireplace, and stunning woodwork throughout. Just off the spacious kitchen is an open dining area with room to expand, while the kitchen itself offers a large center island and views of the three-season room. A generous lakeside office features floor-to-ceiling windows overlooking the backyard and water. The luxurious owner's suite continues the home's signature style with a wall of windows, wood-beamed ceiling, brick accent wall, large walk-in closet, and a beautifully appointed private bath with a spacious corner whirlpool tub, separate tiled shower with glass enclosure, and dual vanities. Two additional oversized bedrooms are located on the main floor and share a large full bath. Also on the main level are a laundry room, abundant storage and closet space, and a convenient half bath off the garage entry. The walkout lower level features a massive recreation room with incredible wood detailing, a 15-foot wet bar, and another stunning beamed ceiling, along with two additional bedrooms and a third full bath that was originally designed to serve as a steam room or sauna. Lovingly maintained and tastefully remodeled over the past decade, this remarkable 5,800-square-foot home sits on a beautiful half-acre lot with 145 feet of frontage on Big Spring Lake. Enjoy breathtaking lake views from many rooms, along with a cascading deck leading to the water, complete with a man-made waterfall and gazebo. Exceptional craftsmanship is showcased throughout with expansive open living spaces, floor-to-ceiling windows, abundant ceramic tile, extensive storage, and m