Contractor — page 1 of 2
574 companies, type “Contractor”.
1 · 2
| Place | Company | Vendor ID | Role | Since |
|---|---|---|---|---|
| Dekalb, IL | 1 Source Mechanical Inc. | 33895 | Contractor | — |
| Elk Grove Village, IL | A & H Plumbing & Heating Co. | 3076 | Contractor | — |
| Urbana, IL | A & R Mechanical Contractors, Inc. | 30440 | Contractor | — |
| Urbana, IL | A & R Mechanical Services, Inc. | 26888 | Contractor | — |
| Murphysboro, IL | A&W Plumbing & Heating, Inc. | 31528 | Contractor | — |
| Elk Grove Village, IL | A-1 Roofing Co. | 6696 | Contractor | — |
| Barrington, IL | A. Horn, Inc. | 30703 | Contractor | — |
| Cicero, IL | A.L.L. Masonry Construction Co., Inc. | 20684 | Contractor | — |
| Lake In The Hills, IL | Abitua Sewer, Water & Plumbing, Inc. | 32512 | Contractor | — |
| Granite City, IL | AC Environmental, Inc. | 34919 | Contractor | — |
| Chicago, IL | Accel Construction Services Group, LLC | 33799 | Contractor | — |
| Ripon, WI | Accurate Control, Inc. | 25802 | Contractor | — |
| Springfield, IL | Ace Sign Co. | 32992 | Contractor | — |
| Princeton, IL | Advanced Asphalt Co. | 1038 | Contractor | — |
| Champaign, IL | Advanced Commercial Roofing, Inc. | 32618 | Contractor | — |
| Elk Grove Village, IL | AGAE Contractors, Inc. | 33697 | Contractor | — |
| Champaign, IL | Agile Construction Services, LLC | 40154 | Contractor | — |
| St Louis, MO | Ahrens Contracting, Inc. | 25825 | Contractor | — |
| Broadview, IL | Air Comfort, LLC | 26454 | Contractor | — |
| Willow Springs, IL | Air Design Systems, Inc. | 21563 | Contractor | — |
| Chicago, IL | Airport Electric Co. | 20057 | Contractor | — |
| Chicago, IL | Akan Mechanical, Inc. | 40161 | Contractor | — |
| St Louis, MO | Alberici Constructors, Inc. | 30524 | Contractor | — |
| Libertyville, IL | Aldridge Electric, Inc. | 4039 | Contractor | — |
| Chicago, IL | ALFA Chicago Inc. | 40547 | Contractor | — |
| Lake Zurich, IL | All American Commercial Roofing, Inc. | 30011 | Contractor | — |
| Burr Ridge, IL | All-Bry Construction Company | 29902 | Contractor | — |
| Woodstock, IL | Alliance Contractors, Inc. | 13926 | Contractor | — |
| St Charles, IL | Alpine Demolition Services, LLC | 35212 | Contractor | — |
| Lawrenceville, IL | Ambraw Asphalt Materials, Inc. | 4453 | Contractor | — |
| St Peters, MO | American Asbestos Abatement LLC | 35596 | Contractor | — |
| University Park, IL | American Backhoe Service & Excavating Company, LLC | 33111 | Contractor | — |
| Carol Stream, IL | American Demolition Corporation | 19425 | Contractor | — |
| Schaumburg, IL | American Electric Construction Company, L.L.C. | 28500 | Contractor | — |
| Vienna, IL | American Shoreline, Inc. | 40924 | Contractor | — |
| Galesburg, IL | AMP Companies, Inc. | 34003 | Contractor | — |
| Chicago, IL | Anchor Mechanical, Inc. | 26451 | Contractor | — |
| Mattoon, IL | Anderson Electric Inc. | 2588 | Contractor | — |
| Bloomington, IL | Anderson Electric Inc. | 29992 | Contractor | — |
| Springfield, IL | Anderson Electric Inc. | 14349 | Contractor | — |
| Danville, IL | Anderson Electric Inc. | 4966 | Contractor | — |
| Woodridge, IL | Antarctic Mechanical Services, Inc. | 22881 | Contractor | — |
| Chicago, IL | Antigua, Inc | 32542 | Contractor | — |
| Springfield, IL | Apex Fire Sprinkler Company LLC | 35696 | Contractor | — |
| Hickory Hills, IL | Arc 1 Electric, Inc. | 33326 | Contractor | — |
| Evansville, IN | Arc Construction Co., Inc. | 5208 | Contractor | — |
| Joliet, IL | Austin Electric, Inc. | 28769 | Contractor | — |
| Rolling Meadows, IL | Automatic Building Controls, LLC | 32286 | Contractor | — |
| Normal, IL | Automatic Fire Sprinkler, LLC | 29274 | Contractor | — |
| Machesney Park, IL | Automatic Fire Systems, Inc. | 4919 | Contractor | — |
| Lombard, IL | Autumn Construction Services, Inc. | 32939 | Contractor | — |
| Springfield, IL | B & B Electric, Inc. | 5478 | Contractor | — |
| Ogden, IL | B.E.C. Mechanical, Inc. | 32237 | Contractor | — |
| Trenton, IL | Baer Heating & Cooling, Inc. | 34721 | Contractor | — |
| Rolling Meadows, IL | Bear Construction Company | 28708 | Contractor | — |
| Belleville, IL | Bel-O Sales & Service Co., Inc. | 16750 | Contractor | — |
| Romeoville, IL | Bennett & Brosseau Roofing, Inc. | 14732 | Contractor | — |
| Pontiac, IL | Bennett Electronic Service Co., Inc. | 30014 | Contractor | — |
| Wauconda, IL | Berger Excavating Contractors, Inc. | 20251 | Contractor | — |
| Champaign, IL | Berglund Construction Company | 29182 | Contractor | — |
| Chicago, IL | Berglund Construction Company | 29181 | Contractor | — |
| Westmont, IL | Berglund Construction Company | 29183 | Contractor | — |
| Mt Vernon, IL | Bevis Construction, Inc. | 34004 | Contractor | — |
| Edwardsville, IL | Bickle Electric Contracting Co., Inc. | 34816 | Contractor | — |
| Mulberry Grove, IL | Blankenship Construction Co. | 30307 | Contractor | — |
| Chicago, IL | Blinderman Construction Co., Inc. | 6102 | Contractor | — |
| Niles, IL | Block Electric Co., Inc. | 29440 | Contractor | — |
| Eureka, IL | Blunier Builders. Inc. | 35821 | Contractor | — |
| Dixon, IL | Boss Carpet One, LLC | 31488 | Contractor | — |
| St Louis, MO | Boyer Fire Protection, LLC | 30403 | Contractor | — |
| Elmhurst, IL | Brandenburg Industrial Service Company | 19530 | Contractor | — |
| Chicago, IL | Brandenburger Plumbing, Inc. | 33032 | Contractor | — |
| Channahon, IL | Brieser Construction Co. | 14414 | Contractor | — |
| Mt Prospect, IL | Broadway Electric, Inc. | 18930 | Contractor | — |
| Red Bud, IL | Brockmeyer Contracting and Supply LLC | 40111 | Contractor | — |
| Champaign, IL | Broeren Russo Builders, Inc. | 33972 | Contractor | — |
| Quincy, IL | Brown Electric Construction Co. | 1070 | Contractor | — |
| Goreville, IL | Brown Electric, Inc. | 20671 | Contractor | — |
| Greenville, IL | Bruce Unterbrink Construction, Inc. | 5533 | Contractor | — |
| Chicago, IL | Burling Builders, Inc. | 28248 | Contractor | — |
| St Louis, MO | Byrne & Jones Enterprises, Inc. | 27570 | Contractor | — |
| East Peoria, IL | C. & G. Concrete Construction Co., Inc. | 33861 | Contractor | — |
| Terre Haute, IN | C. H. Garmong & Son, Inc. | 40175 | Contractor | — |
| Evansville, IN | C. H. Garmong & Son, Inc. | 41156 | Contractor | — |
| Joliet, IL | C. R. Leonard Plumbing & Heating, Inc. | 17570 | Contractor | — |
| Alsip, IL | C.J. Erickson Plumbing Co. | 180 | Contractor | — |
| Downers Grove, IL | C.W. Burns Co., Inc. | 28136 | Contractor | — |
| Tremont, IL | CAD Construction Inc. | 30510 | Contractor | — |
| Calumet City, IL | Calumet City Plumbing and Heating Co., Inc. | 28100 | Contractor | — |
| Rockford, IL | Campos Construction, Inc. | 16097 | Contractor | — |
| Chicago, IL | Candor Electric, Inc. | 28688 | Contractor | — |
| Springfield, IL | Capitol Construction Group LLC | 34817 | Contractor | — |
| Harrisburg, IL | Carmean Electric, LLC | 41137 | Contractor | — |
| Terre Haute, IN | CASE Building Solutions LLC | 40336 | Contractor | — |
| Tinley Park, IL | CCC Holdings, Inc | 32722 | Contractor | — |
| Marshall, IL | Central State Construction, Incorporated | 34472 | Contractor | — |
| Champaign, IL | Champaign A & K Insulation Company | 93 | Contractor | — |
| Swansea, IL | Charles E. Mahoney Co. | 6597 | Contractor | — |
| Broadview, IL | Chas. F. Bruckner & Son, Inc. | 4059 | Contractor | — |
| Chicago, IL | Chi-Town Plumbers Inc. | 40249 | Contractor | — |
| Elk Grove Village, IL | Chicago Area Plumbing & Mechanical Incorporated | 34915 | Contractor | — |
| Chicago, IL | Chicago Fire Protection, LLC | 34918 | Contractor | — |
| Lebanon, IL | Christ Bros. Asphalt, Inc. | 21818 | Contractor | — |
| Chicago, IL | Christy Webber & Company | 32707 | Contractor | — |
| Rolling Meadows, IL | City Service Electric, Inc. | 34199 | Contractor | — |
| East Moline, IL | Civil Constructors, Inc. | 3410 | Contractor | — |
| Freeport, IL | Civil Constructors, Inc. | 3135 | Contractor | — |
| Chicago, IL | Clark Construction Group - Chicago LLC | 33500 | Contractor | — |
| Wilmington, IL | Clennon Electric, Inc. | 35043 | Contractor | — |
| Wilmington, IL | Climate Tech Heating & Cooling, Inc. | 35589 | Contractor | — |
| Ina, IL | Clinton Electric, LLC | 15761 | Contractor | — |
| Schererville, IN | CMM Group, Inc. | 30203 | Contractor | — |
| Chicago, IL | Colfax Corporation | 16208 | Contractor | — |
| Bensenville, IL | Colley Elevator Company | 30617 | Contractor | — |
| St Louis, MO | Collins & Hermann, Inc. | 445 | Contractor | — |
| Chicago, IL | Colmex Group, Limited | 34582 | Contractor | — |
| St Louis, MO | Coltrane Systems, LLC | 33114 | Contractor | — |
| Champaign, IL | Commercial Builders, Inc. | 25853 | Contractor | — |
| Mattoon, IL | Commercial Electric, Inc. | 2725 | Contractor | — |
| Champaign, IL | Commercial Floor Covering, Inc. | 31803 | Contractor | — |
| Dunlap, IL | Commercial Mechanical, Inc. | 7373 | Contractor | — |
| Mackinaw, IL | Comtech Holdings, Inc. | 35697 | Contractor | — |
| Schaumburg, IL | Connor Electric Services Inc. | 40001 | Contractor | — |
| Bloomington, IL | Conrad Sheet Metal Co. | 30129 | Contractor | — |
| Joliet, IL | Construction By Camco, Inc. | 18774 | Contractor | — |
| St Louis, MO | CONTROLCO, Inc. | 30154 | Contractor | — |
| Chicago, IL | Cordos Development & Associates LLC | 31633 | Contractor | — |
| Mt Prospect, IL | Cornerstone Contracting, Inc. | 34809 | Contractor | — |
| Newark, IL | Correct Electric, Inc. | 35264 | Contractor | — |
| Quincy, IL | County Contractors, Inc. | 34524 | Contractor | — |
| Chicago, IL | Courtesy Electric, Incorporated | 40428 | Contractor | — |
| Rock Island, IL | Crawford Heating & Cooling Co. | 4585 | Contractor | — |
| Arlington Heights, IL | Critical Environments Professionals, Inc. | 40102 | Contractor | — |
| Urbana, IL | Cross Construction, Inc. | 3099 | Contractor | — |
| Terre Haute, IN | Crown Electric, Inc. | 11810 | Contractor | — |
| Joliet, IL | Cryer & Olsen Mechanical, Inc. | 22024 | Contractor | — |
| Glenarm, IL | CSD Environmental Services, Inc. | 22524 | Contractor | — |
| Shorewood, IL | CSN Electric LLC | 40719 | Contractor | — |
| Addison, IL | CT Mechanical, LLC | 30795 | Contractor | — |
| Vandalia, IL | Culbertson Heating & Cooling, Inc. | 16009 | Contractor | — |
| Crystal Lake, IL | Curran Contracting Company | 21970 | Contractor | — |
| Coal City, IL | D. Construction, Inc. | 2407 | Contractor | — |
| Peoria, IL | D. Joseph Construction Company | 29364 | Contractor | — |
| Mascoutah, IL | D.E. Martin Roofing Co., Inc. | 21079 | Contractor | — |
| New Baden, IL | D7 Roofing, LLC | 32083 | Contractor | — |
| Davenport, IA | Davenport Electric Contract Company | 363 | Contractor | — |
| Urbana, IL | Davis-Houk Mechanical, Inc. | 30610 | Contractor | — |
| Melrose Park, IL | DCG Roofing Solutions, Inc. | 31635 | Contractor | — |
| Palatine, IL | DeFranco Plumbing, Inc. | 2484 | Contractor | — |
| Springfield, IL | Designed Roofing Systems, Inc. | 20360 | Contractor | — |
| Crystal Lake, IL | Direct Steel LLC | 32441 | Contractor | — |
| Lansing, IL | Diversified General Contractors Inc. | 30487 | Contractor | — |
| Woodstock, IL | Doherty Construction, Inc. | 20901 | Contractor | — |
| Manteno, IL | Double "G" Excavating, Inc. | 26228 | Contractor | — |
| Peoria, IL | Dries Plumbing Inc. | 40210 | Contractor | — |
| Bridgeview, IL | Drive Construction, Inc. | 32661 | Contractor | — |
| Champaign, IL | Duce Construction Company | 15397 | Contractor | — |
| Wilmington, IL | Dutchman Contracting Corp. | 40370 | Contractor | — |
| Crete, IL | Dynamic Industrial Services Inc. | 40892 | Contractor | — |
| Carbondale, IL | E. T. Simonds Construction Company | 3329 | Contractor | — |
| Decatur, IL | E.L. Pruitt Company | 33139 | Contractor | — |
| Springfield, IL | E.L. Pruitt Company | 26284 | Contractor | — |
| Oak Forest, IL | Eco Lighting Services and Technology LLC | 31142 | Contractor | — |
| Wauconda, IL | EHC Industries, Inc. | 25957 | Contractor | — |
| Valley Park, MO | Elastizell of St. Louis, Inc. | 35694 | Contractor | — |
| Hazel Crest, IL | Electrical Systems, Inc. | 17512 | Contractor | — |
| Joliet, IL | Elens and Maichin Roofing and Sheet Metal, Inc. | 4582 | Contractor | — |
| Lebanon, IL | Elevation Coatings & Restoration LLC | 40806 | Contractor | — |
| Evansville, IN | Empire Contractors, Inc. | 26958 | Contractor | — |
| Markham, IL | Environmental Cleansing Corporation | 26042 | Contractor | — |
| Springfield, IL | Environmental Control Solutions, Inc. | 31144 | Contractor | — |
| Dubuque, IA | Environmental Management Services Of Iowa, Inc. | 41021 | Contractor | — |
| South Holland, IL | Environmental Protection Industries, Inc. | 30431 | Contractor | — |
| Skokie, IL | Enviroplus, Inc | 18601 | Contractor | — |
| Franklin Park, IL | Evan's Electric, LLC | 31632 | Contractor | — |
| Springfield, IL | Evans Construction Co. | 181 | Contractor | — |
| St Charles, IL | Everlast Blacktop, Inc. | 35561 | Contractor | — |
| Frankfort, IL | Excel Electric, Inc. | 18382 | Contractor | — |
| Villa Grove, IL | Ezell Excavating Inc. | 40698 | Contractor | — |
| Justice, IL | F & G Roofing Company, LLC | 31024 | Contractor | — |
| Northbrook, IL | F. E. Moran, Inc. | 4009 | Contractor | — |
| Benton, IL | F. W. Electric, Inc. | 15289 | Contractor | — |
| Northbrook, IL | F.E. Moran, Inc. Fire Protection of Northern Illinois | 35444 | Contractor | — |
| Northbrook, IL | F.E. Moran, Inc. Mechanical Services | 26084 | Contractor | — |
| Chicago, IL | F.H. Paschen, S.N. Nielsen & Associates LLC | 30158 | Contractor | — |
| Murphysboro, IL | Fager-McGee Commercial Construction, Inc. | 16283 | Contractor | — |
| Lasalle, IL | Ficek Electric & Communications Systems, Inc. | 21915 | Contractor | — |
| St Louis, MO | Fire Solutions Inc. | 35881 | Contractor | — |
| East Peoria, IL | Fleming Electric, Inc. | 29877 | Contractor | — |
| Addison, IL | Flo-Tech Mechanical Systems, Inc. | 20712 | Contractor | — |
| Chicago, IL | Foundation Mechanics, LLC | 40792 | Contractor | — |
| Burlington, IA | Frank Millard & Co., Inc. | 16447 | Contractor | — |
| Freeport, IL | Freeport Industrial Roofing, Inc. | 15370 | Contractor | — |
| Chicago, IL | Friedler Construction Company | 18028 | Contractor | — |
| Deer Creek, IL | G. A. Rich and Sons, Inc. | 2067 | Contractor | — |
| Arlington Heights, IL | G. E. Riddiford Company | 35127 | Contractor | — |
| Bethalto, IL | G.R.P. Mechanical Company, Inc. | 25833 | Contractor | — |
| Chicago, IL | Galaxy Environmental, Inc. | 26544 | Contractor | — |
| Thornton, IL | Gallagher Asphalt Corporation | 6460 | Contractor | — |
| St Charles, IL | Gateway Glazing, Inc. | 35537 | Contractor | — |
| Belleville, IL | Geissler Roofing Co., Inc. | 1159 | Contractor | — |
| Highland, IL | Gelly Excavating & Construction, Inc. | 33477 | Contractor | — |
| Bettendorf, IA | General Constructors, Inc. of the Quad Cities | 35120 | Contractor | — |
| Alton, IL | General Waste Services, Inc. | 28103 | Contractor | — |
| Chicago, IL | Gilbane Building Company | 32290 | Contractor | — |
| Cherry, IL | Gillan Construction LLC | 35738 | Contractor | — |
| Kankakee, IL | Glade Plumbing & Heating Co. | 235 | Contractor | — |
| Urbana, IL | Glesco Electric, Inc. | 17632 | Contractor | — |
| Romeoville, IL | Grade RC, LLC | 34734 | Contractor | — |
| Jerseyville, IL | Great Western Abatement, Inc. | 28384 | Contractor | — |
| Laporte, IN | Green Demolition Contractors, Inc. | 31236 | Contractor | — |
| Princeville, IL | Greenfield Contractors LLC | 34200 | Contractor | — |
| Chicago, IL | Griggs Mitchell & Alma of IL., LLC | 33961 | Contractor | — |
| Alsip, IL | Grove Masonry Maintenance, Inc. | 21883 | Contractor | — |
| Effingham, IL | Grunloh Building, Inc. | 40994 | Contractor | — |
| Effingham, IL | Grunloh Construction, Inc. | 17051 | Contractor | — |
| Ashley, IL | Guinzy Construction, Inc. | 18956 | Contractor | — |
| Arlington Heights, IL | Gurtz Electric Co | 4084 | Contractor | — |
| Steeleville, IL | H & N Construction, Inc. | 26522 | Contractor | — |
| Chicago, IL | H & P Contractor, Inc. | 22541 | Contractor | — |
| Franklin Park, IL | H&H Electric Co. | 35208 | Contractor | — |
| Pontiac, IL | H. J. Eppel & Co. | 7892 | Contractor | — |
| Harrisburg, IL | H.E. Mitchell Construction Company, Inc | 28791 | Contractor | — |
| Okawville, IL | Haier Plumbing and Heating, Inc. | 13811 | Contractor | — |
| Ottawa, IL | Halm Electrical Contracting, Inc. | 29317 | Contractor | — |
| Belleville, IL | Hank's Excavating & Landscaping, Inc. | 19783 | Contractor | — |
| Terre Haute, IN | Hannig Construction, Inc. | 18151 | Contractor | — |
| Springfield, IL | Harold O'Shea Builders, Inc. | 20133 | Contractor | — |
| Sparta, IL | Haury Plumbing and Heating, Inc. | 265 | Contractor | — |
| Washington Park, IL | Hayden Wrecking Corporation | 13855 | Contractor | — |
| Granite City, IL | Hayes Contracting, Inc. | 31764 | Contractor | — |
| Murphysboro, IL | Heartland Mechanical Contractors, Inc. | 26824 | Contractor | — |
| Tamaroa, IL | Heartland Services, Inc. | 35818 | Contractor | — |
| Peoria, IL | Hein Construction Co., Inc. | 21992 | Contractor | — |
| Springfield, IL | Henson Robinson Company | 279 | Contractor | — |
| Libertyville, IL | Hezcorp Construction Services, Inc. | 31041 | Contractor | — |
| Franklin Park, IL | Hill Mechanical Corp. | 23024 | Contractor | — |
| Millstadt, IL | Hock, Incorporated | 29332 | Contractor | — |
| Goodfield, IL | Hohulin Fence Company | 21719 | Contractor | — |
| Spring Grove, IL | Holian Insulation Company | 20033 | Contractor | — |
| Swansea, IL | Holland Construction Services, Inc. | 28721 | Contractor | — |
| Rushville, IL | Hood Construction Group Midwest, LLC | 32253 | Contractor | — |
| Mattoon, IL | Howell Paving, Inc. | 7420 | Contractor | — |
| Carterville, IL | HSG Mechanical Contractors, Inc. | 25695 | Contractor | — |
| Brookfield, IL | Ideal Heating Company | 1460 | Contractor | — |
| Peoria, IL | Illinois Piping Corporation | 7179 | Contractor | — |
| Bridgeview, IL | Imperial Crane Services, Inc. | 40296 | Contractor | — |
| Rockdale, IL | Indicom Electric Company, LLC | 30762 | Contractor | — |
| Des Plaines, IL | Industria, Inc. | 31647 | Contractor | — |
| Centralia, IL | Industrial Mechanical Contractors, LLC | 17478 | Contractor | — |
| Joliet, IL | Interactive Building Solutions LLC | 35608 | Contractor | — |
| St Louis, MO | Interior Construction Services, LTD. | 20998 | Contractor | — |
| Crete, IL | International Quality Contracting, Inc. | 35385 | Contractor | — |
| Niles, IL | iPower Electric, LLC | 40127 | Contractor | — |
| Watseka, IL | Iroquois Paving Corporation | 7899 | Contractor | — |
| Carbondale, IL | J & L Robinson Development and Construction Company | 4854 | Contractor | — |
| Peoria, IL | J. A. Fritch & Sons, Inc. | 741 | Contractor | — |
| Peoria, IL | J. C. Dillon, Inc. | 13083 | Contractor | — |
| Edwardsville, IL | J. F. Electric, Incorporated | 16859 | Contractor | — |
| Joliet, IL | J. L. Adler Roofing & Sheet Metal, Inc. | 25569 | Contractor | — |
| Davenport, IA | J. W. Koehler Electric, Inc. | 15359 | Contractor | — |
| La Crosse, WI | J.F. Brennan Company, Inc. | 35829 | Contractor | — |
| Carbondale, IL | J3 Contracting LLC | 40427 | Contractor | — |
| St Louis, MO | James G. Staat Tuckpointing, Inc. | 29417 | Contractor | — |
| Lasalle, IL | JB Contracting Corporation | 21672 | Contractor | — |
| Godfrey, IL | JEN Mechanical, Inc. | 29588 | Contractor | — |
| Springfield, IL | Jennings Painting Inc. | 34438 | Contractor | — |
| Broadview, IL | JM Polcurr, Inc. | 26803 | Contractor | — |
| Centralia, IL | Johannes Construction, Inc. | 20755 | Contractor | — |
| Westmont, IL | John Burns Construction Company, LLC | 4514 | Contractor | — |
| Chicago, IL | John Keno and Company, Inc. | 35530 | Contractor | — |
| Mackinaw, IL | Johnco Construction, Inc. | 5521 | Contractor | — |
| Kankakee, IL | Johnson Downs Construction Co., Inc. | 40895 | Contractor | — |
| Highland, IL | Joiner Sheet Metal & Roofing, Inc. | 30846 | Contractor | — |
| Gurnee, IL | Joseph J. Henderson and Son, Inc. | 6100 | Contractor | — |
| Godfrey, IL | Jun Construction Co. | 19449 | Contractor | — |
| Westmont, IL | K-Five Construction Corporation | 11944 | Contractor | — |
| Johnston City, IL | K. D. Crain and Sons, Inc. | 1959 | Contractor | — |
| Jacksonville, IL | K. E. Vas Company | 11368 | Contractor | — |
| Effingham, IL | K. Wohltman Construction, Inc. | 23549 | Contractor | — |
| Markham, IL | K.L.F. Enterprises, Inc. | 33251 | Contractor | — |
| Chicago, IL | K.R. Miller Contractors, Inc. | 21309 | Contractor | — |
| Sauget, IL | Keeley Construction Group, Inc. | 30121 | Contractor | — |
| St Louis, MO | Keeley Restoration Services, LLC | 41210 | Contractor | — |
| Albers, IL | Kehrer Brother's West Roofing, Inc. | 26557 | Contractor | — |
| Glen Carbon, IL | Keller Construction Inc. | 3642 | Contractor | — |
| Chicago, IL | Keller North America, Inc. | 34908 | Contractor | — |
| Hanover, MD | Keller North America, Inc. | 28110 | Contractor | — |
| Barrington, IL | KEO Illinois, LLC | 40171 | Contractor | — |
| Itasca, IL | Kiewit Infrastructure Co. | 17547 | Contractor | — |
| Raymond, IL | Kinney Contractors, Inc. | 3641 | Contractor | — |
| Westmont, IL | Kinsale Contracting Group, Inc. | 28393 | Contractor | — |
| Goodfield, IL | Knapp Concrete Contractors, Inc. | 29078 | Contractor | — |
| Harvey, IL | Knickerbocker Roofing and Paving Co., Inc. | 7824 | Contractor | — |
| Bartelso, IL | Kohrmann Electric Co., Inc. | 16369 | Contractor | — |
| Highland, IL | Korte & Luitjohan Contractors, Inc. | 26188 | Contractor | — |
| Highland, IL | Korte Construction Company | 17530 | Contractor | — |
| Blue Island, IL | Krause Construction Inc. | 40117 | Contractor | — |
| Trenton, IL | KRB Excavating Inc. | 33272 | Contractor | — |
| Peoria, IL | Kreiling Roofing Co. | 4889 | Contractor | — |
Alphabetical order — this site ranks no one. Companies in the Illinois Capital Development Board file of October 2, 2026. Individuals are not on this site. How to read this.