Building Materials and Lumber

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.


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.

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 windowsvinyl 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. 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.  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.

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In-Stock and Special Order Product Categories

Dunn Lumber offers a wide range of building materials, available in-stock and through special order.

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Does your home needs improvement? Whether you are a weekend warrior or looking for a professional to help, we have you covered. Below are services that we provide so that we can help guide you through your projects.


Whether it’s your first DIY project or 999th, Dunn Lumber has industry experts on hand ready to help with great advice to help your project finish on time and on budget.

Home Plan Designs

Whether it’s a plan on Pinterest or an idea drawn on a napkin, we can help. We’ll listen to your needs and provide feedback to develop a perfect the plan! Expect top class products and services, we take care of all your construction needs!

Free Delivery

On qualified purchases, we will deliver to the job site for free.

Cabinetry Design

DC Design Studio is an important partner in your new cabinets’ project. Your Dunn Lumber cabinet designer will help optimize, maximize & organize every inch of your project, providing a beautiful, and functional space.

Energy Rebates

Government agencies, utilities and other organizations offer a variety of tax credits, rebates and other incentives to support energy efficiency. To learn more about what is available in your state, click here.

Color Paint Matching

Browse through the variety of industry-leading interior & exterior paints, stains & primers that Dunn Lumber offers. Find the right colors or match the right color, get inspired & tell us all about your project. We’ll take it from there!

Shop in Store

Shop our retail stores for the best brands! If you need a tool for a special job, we either have it or can order it – no matter what! We have specialty brands, name brands and our very own Do It Best labeled products available.


Estimating services on-site or in-store, our estimates are created by industry experts to improve accuracy!