Business ProfileWindow Installers in Rockford, Illinois

KobyCo Door & Window

Taking Calls in Rockford Today 4.70 (153 reviews)(815) 270-5484

KobyCo Door & Window

KobyCo Door & Window provides window replacement and installation in Rockford and other Northern Illinois communities. Its showroom is in Loves Park.

Last Updated October 2, 2026.

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Business Highlights

KobyCo says it has served Illinois and Wisconsin for almost four decades.
It describes its installers as fully insured.
The company offers a one-year labor warranty.

Service Area

Argyle, Beloit, Belvidere, Loves Park, Machesney Park, New Milford, Poplar Grove, Rockford, Rockton, Roscoe, Timberlane and Winnebago, as well as Southern Wisconsin.

Local Business Taking Calls

KobyCo Door & Window is one of 10 window installers ProsGrade lists in Rockford, Illinois.

Taking Calls

Taking calls through ProsGrade

Listing details

8 services listed, including Window replacement, Awning windows and Bay windows. Open Monday to Saturday. Rated 4.7 from 153 reviews.

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Published local profile

How This Business Compares

How KobyCo Door & Window compares with the other 9 window installers on ProsGrade in Rockford, using public Google ratings and review counts.

Ranks in the top half of the 10 Rockford window installers on ProsGrade by Google rating and review volume.
Rated 4.7 on Google, at or above the 4.7 average of other Rockford window installers on ProsGrade.
One of 4 Rockford window installers on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

8 services

Window replacementMaterials, colors, trims and finishes
Awning windows
Bay windows
Bow windows
Casement windows
Double-hung windows
Garden windows
Specialty windows

Reviews

What customers say

Customers praise professional installation crews and smooth overall experiences. One customer noted a long wait for doors and thought they were very expensive, but praised the installers' work. Another said a special-order window took time to arrive, while installation was quick once it was ready.

Customer Reviews

Mike Rood

I am overall very happy with KobyCo. It was a long wait for our doors and I still think they were very expensive, but, the installers did a great job. The doors are tight and work well. They look outstanding! They are very solid and well constructed. Well pleased.

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Sharon McGraw

We decided it was time to replace our windows as they were single pane originals when the house was built, and in bad shape. We got three quotes and decided on KobyCo. When we met with Mike we were impressed by his vast experience and knowledge. Mike showed us a sample of their window construction and we were impressed with the high quality (double pane). The installation crew showed up as promised and were extremely professional and accommodating to ensure we were happy with their service. We would highly recommend KobyCo!

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Barbara Boyd-Lewis

Thank you Kobyco! I am pleased with the results of my replacement windows. From the estimate to install everything was seamless. Shout out to Carrie in the office for her flexible scheduling and shout out to Jason and his team. Jason's team was punctual , professional and detailed. I will not hesitate to use Kobyco again.

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Melissa B

Our whole experience with KobyCo was seamless. From the moment we walked into the showroom Mike Martin was knowledgeable and helpful. The window we were replacing was a special order and Mike was upfront that it would take time to come in and once it was ready, the installation was quick and easy. The employees were on time and respectful of our property. We have had the window installed in July 2025 and have not had any issues. I will certainly consider KobyCo in the future for additional window replacements.

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Gordon Neese

Our expanded house includes the original1846 limestone farm house and the 1990 installed Marvin double hung windows - 2 upstairs and 4 downstairs - were rotting out. KobyCo replaced them with hugely functional and attractive double hung thermo-pane windows in one day at an incredibly reasonable price. The cleanup was meticulous and the windows' trim work - both inside and outside - look outstanding. KobyCo was incredibly professional from beginning to end; installation scheduler Kari was especially helpful. I couldn't be more pleased with KobyCo and highly recommend them; 5 stars doesn't seem like enough.

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