Penny Window has been the trusted replacement window company serving St. Louis and St. Charles counties since 1953. We offer replacement windows, prime windows, exterior doors, siding, gutters, and affordable window repair. Serving homeowners and contractors alike, we provide top-of-the-line window and door products at a discounted price from Anderson Windows, Quaker Windows & Doors, Crystal Window & Door Systems, and Atrium Windows and Doors. Visit our website today for a free estimate and the best in new financing.