323 Dennison Drive Welcome home to this spacious 4-bedroom, 3.5-bath property perfectly positioned on a desirable corner lot in the heart of O'fallon. Designed for both everyday living and entertaining, the main level features a formal dining room plus an open-concept kitchen, dining, and living room combination that creates a warm, connected living space. The primary suite offers a relaxing retreat with an en-suite bath featuring dual vanities, a stand-alone shower, and a separate soaking tub. Additional highlights include a built-in bookshelf, main-floor laundry room with shelving and utility sink and two kitchen pantries for exceptional storage. Downstairs, the fully finished basement expands your living space and includes a full bathroom, ideal for guests, recreation, or a home office setup. Outside, enjoy a fenced, spacious backyard—perfect for pets, play, or outdoor gatherings. A 2-car attached garage, a mix of hardwood flooring and carpeting, and a functional, well-thought-out layout complete this move-in-ready home. Conveniently located and full of space, this one checks all the boxes.