- Alliance Metal Products
 - Palatine - Specialises in structural and miscellaneous steel fabrication and installation. - Babco Construction Inc.
- Evanston - General contractor providing preconstruction, consrtuction and value engineering services. Specialises in hotel renovation, shopping and retail tenant space.
- Blinderman Construction Company
- Deerfield - Specialising in renovation and new construction of commercial, medical, multi-family housing, office, industrial, civil, and transit projects.
- CD City Services, Inc.
- Northfield - Industrial, commercial, and residential construction and remodeling in the Chicagoland area.
- Commercial Resources Construction Co., Inc.
- Chicago - Contracting, construction management and/or turnkey services for commercial and high-rise related work around the United States.
- Fredrickson/KRJ
- Chicago - Specialising in interior construction and maintenance of office and retail spaces in Chicagoland.
- Graycor
- Homewood - Constructs a variety of commercial, industrial, health care, and institutional facilities.
- Holz Construction Company
- Marengo - Providing commercial and industrial general contracting services to McHenry County - specialise in pre-engineered metal buildings.
- James Shoffner General Contracting
- LaPorte - JSG provides commercial and industrial construction, complete plant maintenance, restoration, foundations, machinery installation, and more.
- Keeley Construction, Inc.
- Chicago - General contracting and construction management; specialises in commercial, industrial, and retail renovations.
- Krusinski Construction Company
- Oak Brook - Designers and builders of industrial and commercial structures.
- Lamp Incorporated
- Elgin - Projects include financial instutions, hospitals, schools, and public libraries.
- Leopardo Companies, Inc.
- Glendale Heights - Provider of management services to the interior, healthcare, industrial and retail industries.
- O'Neil Industries, Inc.
- Chicago - Commercial building contractor for the institutional, industrial, aerospace, communications, healthcare, retail and hospitality industries. Locations nationwide.
- Paul J. Krez Group of Companies
- Morton Grove - Providing commercial & industrial insulation, fireproofing, flooring, roof deck systems, lightweight concrete, and more.
- Power Construction
- Chicago - Specialises in the hotel and healthcare industries, and light industrial projects.
- Precision Contracting
- Evanston - Offers general contracting and construction management services for commercial, industrial, institutional and retail projects.
- Pro-Dive, Inc.
- Ottawa - Providing inspection, construction and salvage services.
- RC Wegman Construction Company
- Aurora - Contractor and pre-engineered building dealer, providing construction management and design build services for new-renovated commercial, public, and industrial sites.
- RG Construction
- Elmhurst - Specialises in wall and ceiling services including gypsum board assemblies, metal framing, acoustical treatments, insulation, and carpentry.
- S.A. Healy Company
- Lombard - Specialising in underground construction.
- Scown Building Company
- Wheeling - Chicago-based general contractor specialising in renovation and build-outs for commercial, industrial, petroleum c-stores, and car wash construction customers.
- Stonitsch Construction
- Joliet - Offers design, build, and management services.
- Stratford Company
- Barrington - Specialising in interior office improvements in the Chicago Area.
- Vissering Construction Company
- Streator - Contracting and management firm.
- Walsh Group
- Chicago - Commercial, industrial, and institutional contractors and managers.
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