Duncan's Window and Door and Duncan's Heritage Construction are leading providers of window and door replacement services as well as construction services in Oshkosh, Omro, Winneconne, and the surrounding areas.  We enjoy working with local clients on their projects.

With over 20 years of experience, we have built a reputation for exceptional craftsmanship and customer service. As a family-owned and operated business, they take pride in their work and strive to exceed their clients' expectations on every project.

Duncan's Window and Door specializes in replacing old, outdated windows and doors with energy-efficient options that can enhance the curb appeal and functionality of any home or business. 

Duncan's Heritage Construction provides a wide range of construction services, including new construction, remodeling, and renovation. Their team of highly skilled professionals has the expertise and experience to handle any project, big or small.

Our commitment to excellence is reflected in their high ratings on Google and Home Advisor, which is a testament to the quality of their work and customer service. 

Duncan's Window and Door and Duncan's Heritage Construction continue to be the go-to company for anyone looking for top-notch window and door replacement and construction services in the Oshkosh, Omro, Winneconne, and the Fox Valley and beyond.