Window World is the largest replacement window company in the United States, and is the only one to offer the $189 Any Size Window & Warranty Deal. Stationed in Grand Rapids, Window World of West Michigan serves all areas surrounding Barry, Kent, Allegan & Ottawa Counties. Because of our superior quality products, and exceptional warranty guaranteeing them, our vinyl replacement windows have earned the coveted Good Housekeeping Seal. Our goal is to serve all of Grand Rapids with the finest quality vinyl replacement windows and doors.