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Lakeland Building Supply is the premier wholesale source for new doors in Janesville! For more than 40 years, we’ve provided area homeowners and remodeling professionals alike with top-tier products, including patio and entry doors. You can trust our team to offer first-class design services and expert advice based on your specific needs. 


When you’re looking for top-of-the-line Janesville doors, Lakeland Building Supply delivers the superior selection! We’re an A+ BBB-rated company that’s committed to five-star customer service. Our replacement door products include: 


  • Janesville Patio Doors
  • Janesville Entry Doors
  • Fiberglass and Wood Doors 

Premium Janesville Entry Doors 

Replacement doors are a great way to increase the value of your home, as well as your energy efficiency. Lakeland Building Supply offers a vast range of Janesville entry doors in different colors, finishes, and designs. We have a solution for any home style or aesthetic preference! 


Energy-Efficient Patio Doors in Janesville 

As a homeowner in Wisconsin, you know that you need patio doors that can stand up to intense summer humidity and frigid winter lows. Lakeland Building Supply provides Janesville doors with industry-leading efficiency features. Whether you want sliding or French doors, our products prevent thermal leaking and energy waste! 


Customizable Fiberglass and Wood Doors 

When it comes to new doors in Janesville, no other provider can match the selection of Lakeland Building Supply! We offer entry wood doors with elegant sidelights and high-end hardware options. We also provide stylish fiberglass doors with low-maintenance benefits. 


Find Out More About Our Janesville Entry Doors Today 

The knowledgeable staff at Lakeland Building Supply can help you find the perfect entry door for your home from our wide range of products! Stop by our showroom to learn more about our quality doors, windows, and siding in Janesville, WI, or fill out our quick online form to request a free, no-pressure cost estimate for new doors. 

Accepting Website & Phone Orders For Warehouse Pick-up