Complete Exterior Solutions
For Your Home


Your Top Source for Exterior Renovation

GMART, Inc. is proudly owned and operated by home improvement contractor Grzegorz Martyniak. Grzegorz and his team specialize in both residential and light commercial replacement and new siding, windows, doors and gutters. We only use quality-made products that are suited for your exact needs. GMART, Inc. employs a professional team of quality-conscious craftsman who have the knowledge, experience, and the most advanced technology to raise your project to perfection.

At GMART, Inc., we are driven to not only deliver a high quality finished product, but we strive to complete each job on time and on budget. When you entrust us with your next home exterior renovation project, we’ll work closely with you to identify your needs, recommend the ideal strategies for achieving success, and transforming your property into a more functional and aesthetically pleasing environment.

Learn More

We love customer feedback

Check out what our clients have to say:

“Gregory gave me a very good, competitive price. The work started right on time. Gregory had a few suggestions for the job, that were very good. There were three workers, including Gregory. They complete my job in a minimum amount of time. GMART’s workmanship was excellent. I would definitely hire GMART again. In fact, I am thinking of replacing my windows in the near future; and will definitely give GMART a call.”

Steven D.

“I had previously had a contractor out to look at my siding and was told it would need to be replaced. Greg came out and told me the siding was in good shape. While Greg couldn’t do the work I needed, he saved me $2000 and gave me a name of someone who would fix my problem. When I have future work to do, Greg from GMART will be my go to guy for siding, gutters, and windows-his prices for those estimates were amazing!”

Mark T.

“It was a pleasure to work with Greg from GMART as everything that I requested was handled quickly and professionally. My home looks like a new one and I have received many compliments from neighbors. I highly recommend GMart to everyone.”

Christopher W.




Bartlett, IL

Contact Us