Alexander Lumber has been helping build communities since 1891, and we plan to continue doing so well into the future. With locations across Illinois, southern Wisconsin, and northern Iowa, we are pleased to offer general contractors, custom builders, professional remodelers, and DIY homeowners a wide selection of high-quality materials, including lumber, decking, cabinetry, windows, siding, doors, and much more, to complete building projects of any size. Alexander Lumber specialists are available to guide you through your project from beginning to end: We make product selection easy, and our knowledgeable sales staff is happy to answer any questions you might have along the way.