Duncan's Window & Door LLC

About

At Duncan’s Window and Door and Duncan’s Heritage Construction, we believe trust is built on honesty, transparency, and exceptional craftsmanship. Serving Oshkosh, Omro, Winneconne, and the surrounding areas, we specialize in premium window, door, and construction services backed by over 20 years of experience. As a family-owned business, we take pride in every project, delivering personalized service and superior results. We offer full-service window installation, including double-pane and triple-pane replacements, patio and entry doors, full-frame installations, resizing, and custom openings. When you choose Duncan’s, you choose precision, quality, and a team committed to transforming your home with care and integrity.

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