About K Windows & Doors

K Windows & Doors carries forward the Kornesczuk family's window and door craftsmanship, with roots dating to 1978.

Today, Jim and Greg Kornesczuk serve homeowners and property managers throughout Chicago's western and northwestern suburbs. They provide honest guidance, careful workmanship, and direct accountability for the finished job.

We specialize in thoughtful recommendations, dependable scheduling, and clean, detail-focused installations built to last. Every project is approached with the same standard: do it right, communicate clearly, and leave the space better than we found it.

Our work spans full window and door replacements, repair and service, entry systems, new construction, and custom solutions for residential, multi-unit, and commercial properties. Whether we are coordinating with a homeowner, association board, property manager, or general contractor, we prioritize clarity, professionalism, and craftsmanship at every step.

As a family business, our reputation matters. We stand behind our work, show up when we say we will, and treat each property with respect.

If you're looking for straightforward guidance and quality installation without the sales pressure, we're here to help.