Custom atrium ranch on 3.65 acres in Lake St. Louis! This energy-efficient home is built with 2x6 construction, new Anderson windows, LED lighting throughout, geothermal heating & cooling (WaterFurnace Series 7 variable speed), and a 20.2 kW solar array for incredible cost savings. The open-concept main level features a fully remodeled bathroom, gourmet kitchen with custom cabinetry, granite countertops, high-end appliances, hands-free faucet, and a large center island that flows into the breakfast room and covered deck. The living room boasts floor-to-ceiling windows, motorized Zebra shades, and a wood-burning fireplace, with a formal dining room and main-floor office adding function and style. Two luxurious primary suites--one on each level--each include spa-like bathrooms, with the lower level offering a heated bathroom floor. The finished lower level also includes a full 2nd kitchen, large family room, optional gym/4th bedroom, oversized windows for natural light and ample storage space. Smart home features include Google Home integration, a central automation hub, and whole-house water filtration. Step outside to your private backyard oasis with patio, hot tub, and landscaped yard. Additional highlights: 3-car garage with Tesla charging station, storage shed, and outlets under the eaves for holiday lights. Cleared, level lot offers endless possibilities--pool, sports, or entertaining space. Luxury, efficiency, and thoughtful design all in one!