What Makes us

We stand behind our work. We are a family-owned business with integrity and values. Getting a great price doesn't mean a lack of quality. Our buildings are manufactured to the highest industry standards. Our design, detailing and engineering staff guarantees your new building will be built accurately and cost effectively. Our design staff has the flexibility and control to build to your special needs and requirements.

Building Systems of Illinois has developed a reputation for constructing and designing the highest quality buildings at very affordable prices. We have constructed commercial, municipal, recreational, agricultural, and industrial buildings for virtually every type of business and use throughout Illinois.

General Contracting
Design-Build Services
Project Management

Why Choose BSI?

We tackle commercial construction projects of every size while consistently providing top-quality commercial contracting services. We'll discuss your project, identify its unique needs, develop a plan based on decades of industry experience, and execute it to ensure efficient, top-quality construction.

"Building Systems of Illinois, Inc has completed over 50 commercial retail projects for our company across four states. They have a proven track record of completing projects on time with great quality and an outstanding safety record."

R.B. Grisham

The Overland Group

"During the past 10 years Building Systems of Illinois, Inc. has completed several projects for the Decatur Housing Authority. The company offers high quality service, and their staff will go above and beyond to make sure the work is completed in a professional manner. They manage their subcontractors well and hold them to the same standards. You will not regret hiring BSI for your building and construction needs. I look forward to their participation on my future projects."

Diane Hackert

Decatur Housing Authority

"Best contractors in the Midwest. John, Greg, Brian athe best and most knowledgeable people I have ever dealt with. You will not be disappointed in any of their work or service from the top on down. Last thing if their bid is a little higher still go with them because they don't cut corners for quality. Their name depends on it, good ain't cheap and cheap ain't good. Thanks Gang will be using you all again."

Eldon Berg


"Great company to work with. Highly recommended."

Don Shimkus

 United Glass and Door