We provide products & services that make it easier for contractors and builders to operate their businesses efficiently and profitably.

We are your partner in business.

With your next project coming up, big or small, we are here to help. Our goal is to guide you through your project because we want to make it as easy as possible for you.

For over 100 years, Dunn Lumber has been known for providing quality building materials to all of Southeastern Wisconsin and Northern Illinois.  Let our experts provide you with an accurate estimate for any size project.

Whether your project is new windows or replacement windows, remodeling or new construction, Dunn Lumber is your source for standard and/or custom size quality wood windows, vinyl windows, or composite windows.  We’ve partnered with several excellent manufacturers and our experts will guide you through the selection process. If your project involves interior or exterior doors, high quality doors.

Dunn Lumber has everything you need to transform your backyard into paradise. Carefree decking featuring TimberTech composite decking and railing products. Dunn Lumber is also one of the only stocking dealers in the Midwest for Zuri Decking. You’ll find several styles and colors of composite decking and lighting accessories in stock at Dunn Lumber along with our cedar and premium treated deck boards.  Plus, our experts will provide you with a professional, computerized design.

Our showroom displays pre-finished samples of LP SmartSide and clear cedar beveled siding.  Also on display are CertainTeed’s vinyl siding products, Celect composite lap siding, steel roofing and siding for both residential and agricultural use, stone veneer from Eldorado, Versetta and Boulder Creek, many Fypon products along with roofing samples from IKO, Tamko and CertainTeed.  Numerous hand samples are available from other manufacturers for your selection convenience.  All sidings are available pre-finished in any color you can dream of, many with a lifetime warranty.