#1 Contractor in Champaign, IL for


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C-U Under Construction is your source for new windows and doors. Residents in and around Champaign, IL looking to upgrade from builder-grade construction or replace windows that are older than 5 years old, should contact the C-U team for replacement services. Many people may not realize this but over time, window designs have become much more efficient, helping to keep your home warm during harsh winters and cool during warm summers. If your current windows and doors are not working at optimal efficiency, it is time to replace them! C-U Under Construction offers competitive pricing for window and door replacements services. We have been the leading construction company in the greater Champaign region since 2008 and our reputation for providing high-quality construction and trade services has never faltered through the years.

Construction is our passion and our team always takes pride in our craftsmanship. Choose C-U Under Construction for your window and door replacements and you can expect quick and reliable service on your job.



  • Replacement windows to help reduce heating and cooling costs
  • New windows add beauty and value to your home
  • Efficient team: you can count on us
  • Multiple brands available to fit your budget
  • Window trimmings on the exterior and interior to make sure the windows have a proper fit and finish
  • Replace exterior and interior doors
  • Projects of all sizes
  • Minimal subcontracts
  • Fast and reliable service

Building Better Together

The C-U team puts quality, consistency, innovation, and determination at the forefront of every job. Whether this is your first time working with our team or you are a veteran customer, you can count on us to get the job done quickly and accurately, every time. As your leading source for window and door replacement services in Champaign, IL, it is our promise to offer competitive pricing and provide the best services you can find. Because we offer a wide variety of both construction and trade services, we hope to build a lasting relationship with each of our clients, always being the team to call when you need any work done on your home or business. No project is too big or too small for the C-U Under Construction team.



100% Satisfaction Guaranteed
Certified Technicians
Licensed, Bonded, & Insured
5 Star Ratings


Kitchen and Bath Remodeling

The sky is the limit when it comes to remodeling your kitchen or bath. C-U Under Construction can bring your vision to life, providing high-quality remodeling services at an affordable rate.

Additions and New Construction

You can trust C-U Under Construction with your new build or add-on. Our contractors have the knowledge and expertise to take on any project of any size, 100% satisfaction guaranteed.

Commercial Projects

C-U Under Construction is a leading commercial contractor in the region. With decades of experience, our team has the experience necessary to get your project done quickly at the highest quality.


From the ground up, C-U can build your attached or detached garage. Our team has the knowledge and expertise to get the job done quickly, providing every aspect of the build in-house.

Decks, Pergolas, & Fences

Creating an outdoor space where you can entertain family and friends is ideal and teaming with the right company to create that space is crucial. Connect with a team member to see our portfolio and get inspired!

Basement Finishing

Increase the value of your home while creating a living space perfect for entertaining when you hire C-U to finish your basement. We are known in the region for creating one-of-a-kind spaces at affordable rates.


Your roof is one of the most crucial components of your home and finding a trusted team to install your new roof is important. C-U Under Construction has decades of experience replacing and installing all types of roofing systems.


Contact Us


1153 County Road 1200 E Suite 2
Champaign, IL 61822