Middletown, CT (860) 883-8910
I've been a homeowner for 12 years. Since then I have relied on John and his team on dozens of occasions - from additions, to my dining room makeover, and most recently - our new roof. Thanks again, John! Always affordable & reliable!
- Sarah H. from
   Haddam, CT
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Ready for new windows in your home? John DeMelis General Contractors are proud to help Connecticut homeowners.

If you're thinking about replacing your windows or doors, there's no reason to wait. The benefits start immediately. From enhancing your home's interior to adding to its curb appeal, new windows and doors transform a Middlesex County home from ordinary to outstanding. What's more, they provide one of the best returns on investment of any home remodeling project.

We are your partners in your window replacement project. Our job is to educate you about windows and doors, then guide you through the selection process according to your wants, needs and budget. Demcon, LLC offers the area's largest selection of major window & door manufacturers from which to choose. Our offering includes products made of all wood, wood clad in aluminum or vinyl, solid vinyl, all aluminum and fiberglass. For that special room we have window interiors made of oak, maple, cherry, mahogany,knotty pine and fir. From sash replacement kits to full frame replacements, we have a solution for you. Our ultimate goal is to provide you with a seamless package of product and installation that provides you with beauty, energy savings, comfort and peace of mind.

60+ Years of Combined Family Experience with Window Replacement

Let's discuss our ideas for you on how to make your home look its best.

Our family business has been replacing and installing new windows in the following areas for three generations:

Middletown, East Hampton, Cromwell, Berlin, Higganum, Durham, Madison, Middlefield, Old Saybrook, Portland, Haddam, Guilford, Meriden, Glastonbury, and Colchester.

Let's talk about your windows.

We'll get right back to you.

©2019 John DeMelis General Contractor dba Demcon, LLC (CT)
We do floor sanding in Middletown, East Hampton, Cromwell, Berlin, Higganum, Durham, Madison, Middlefield, Old Saybrook, Portland, Haddam, Guilford, Meriden, Glastonbury, and Colchester.
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