1 in Illinois
7 outside Illinois

Source: IQS Directory database snapshotOur Methodology

In Illinois: Suppliers on this page whose listed address is in Illinois. They are listed first.
Outside Illinois: Suppliers this page lists from other states and provinces, after the ones in Illinois.
As of: When this page was generated from the database. Pages regenerate at most once an hour.
Counted: Oct 30, 2026, 12:37 AM ET

Prefab Office Manufacturers in Illinois

IQS Directory provides a detailed list of prefab office manufacturers and suppliers in Illinois. Find prefab office companies that can design, engineer, and manufacture prefab offices to your specifications. Peruse our website to review and discover top prefab office manufacturers with roll over ads and complete product descriptions. Connect with the prefab office companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product news articles. Whether you are looking for manufacturers of prefabricated buildings, portable offices, or relocatable buildings of every type, IQS is the premier source for you.

All prefab office manufacturers

Contents (5 sections)

Prefab Office Manufacturers in Illinois

1 supplier in Illinois is listed first, then 7 suppliers located outside Illinois. Select any of them and send one quote request.

Prefab office manufacturers in Illinois, then suppliers outside Illinois
Manufacturer	Location	Contact	Actions
JMO Modular At JMO Modular, we specialize in designing and manufacturing modular buildings that deliver exceptional value, speed, and flexibility to our clients. With a strong commitment to quality and innovation, we build modular solutions that serve a wide range of industries, including education, healthcare, government, commercial, and industrial sectors.	LocationMarion, IL	800-747-5467 jmollc.com(opens JMO Modular website in a new tab)	View Manufacturer
Donobrog, Inc. Donobrog has been a leading supplier of high-quality prefabricated modular buildings and modular offices since 1985. We offer single offices, 2-story multiunit enclosures and noise enclosures in a variety of sizes, styles and configurations. Call today for more information!	LocationSalem, IN	502-231-9226 donobrog.com(opens Donobrog, Inc. website in a new tab)	View Manufacturer
Nucor Building Systems Nucor Building Systems custom manufactures storage buildings, warehouse buildings, pre-engineered steel buildings and more for industrial, community, commercial and agricultural markets. We will build to your specific design requirements for the metal building system you need.	LocationWaterloo, IN	260-837-7891 nucorbuildingsystems.com(opens Nucor Building Systems website in a new tab)	View Manufacturer
Speed Space Speed Space has been manufacturing modular buildings and offices for various industries for over 30 years. We offer standard and customized modular offices, portable buildings, guard houses and more. Understanding that changing products, production lines, methods, tooling, etc. create a demand for flexible office systems, Speed Space provides just that with custom solutions to your modular needs.	LocationGoshen, IN	800-418-2666 speedspace.org(opens Speed Space website in a new tab)	View Manufacturer
Commercial Structures Corp. For over 40 years, Commercial Structures Corporation has been family owned and operated. We build and manufacture many different modular buildings for a diverse number of industries. We strive to provide high-quality products at an affordable cost.	LocationNappanee, IN	574-773-7931 comstruc.com(opens Commercial Structures Corp. website in a new tab)	View Manufacturer
Par-Kut International Inc. Need prefab offices? Par-Kut International has you covered. Our steel welded prefab offices have no limitations or constraints. Unlike most panelized units, they can delivered completely assembled and easily moved with a forklift or crane. With a simple flip of the switch, a prefab office from us will be powered up with all the electrical accessories the customer sees fit. Our cost-effective, portable buildings are sure to help your application flourish. Call Par-Kut today to start saving.	LocationHarrison Township, MI	586-468-2947, 800-394-6599 parkut.com(opens Par-Kut International Inc. website in a new tab)	View Manufacturer
Inplant Offices InPlant—Modular Buildings since 1987. Design through installation, InPlant manufactures the widest range in prefabricated buildings—Offices, Cleanrooms, Partitions, Equipment Enclosures, & Booths customized to fit your needs. 1.75" or 3" Walls with Systems in steel or aluminum. Systems are fabricated based on use with materials for environmental control & staff protection. Reconfigure or relocate Systems: a non-progressive design. Add, upgrade & replace Walls, windows or doors—maximizing your ROI.	LocationSt. Louis, MO	800-356-3199 inplant.com(opens Inplant Offices website in a new tab)	View Manufacturer
Porta-King Building Systems Porta-King Building Systems is a manufacturer of prefabricated steel, pre-engineered and storage buildings. Our buildings include guardhouses, in-plant offices, modular offices and relocatable buildings. Our modular buildings are used by many industries. Call us today!	LocationEarth City, MO	888-210-3109 portaking.com(opens Porta-King Building Systems website in a new tab)	View Manufacturer

Cities in Illinois

300

Abingdon
Albion
Aledo
Altamont
Alton
Amboy
Anna
Arcola
Ashley
Assumption
Athens
Atlanta
Auburn
Aurora
Ava
Barry
Batavia
Beardstown
Belleville
Belvidere
Benld
Benton
Berwyn
Bloomington
Blue Island
Braidwood
Breese
Bridgeport
Brookport
Bunker Hill
Burbank
Bushnell
Byron
Cairo
Calumet City
Canton
Carbondale
Carlinville
Carlyle
Carmi
Carrollton
Carterville
Carthage
Casey
Centralia
Centreville
Champaign
Charleston
Chenoa
Chester
Chicago
Chicago Heights
Chillicothe
Chrisman
Christopher
Clinton
Coffeen
Colchester
Collinsville
Colona
Columbia
Country Club Hills
Countryside
Creal Springs
Crest Hill
Crystal Lake
Cuba
Dallas City
Danville
Darien
Decatur
DeKalb
Delavan
Des Plaines
Dixon
Du Quoin
Earlville
East Dubuque
East Moline
East Peoria
East St. Louis
Edwardsville
Effingham
El Paso
Eldorado
Elgin
Elmhurst
Elmwood
Eureka
Evanston
Fairbury
Fairfield
Fairview Heights
Farmer City
Farmington
Flora
Freeport
Fulton
Galena
Galesburg
Galva
Geneseo
Geneva
Genoa
Georgetown
Gibson City
Gillespie
Gilman
Girard
Golconda
Grafton
Grand Tower
Granite City
Grayville
Greenfield
Greenville
Griggsville
Hamilton
Harrisburg
Harvard
Harvey
Havana
Henry
Herrin
Hickory Hills
Highland
Highland Park
Highwood
Hillsboro
Hometown
Hoopeston
Hurst
Jacksonville
Jerseyville
Johnston City
Joliet
Jonesboro
Kankakee
Keithsburg
Kewanee
Kinmundy
Knoxville
La Harpe
Lacon
Lake Forest
Lanark
LaSalle
Lawrenceville
Le Roy
Lebanon
Leland Grove
Lewistown
Lexington
Lincoln
Litchfield
Lockport
Loves Park
Macomb
Macon
Madison
Marengo
Marion
Markham
Maroa
Marquette Heights
Marseilles
Marshall
Martinsville
Mascoutah
Mason City
Mattoon
McHenry
McLeansboro
Mendota
Metropolis
Minonk
Moline
Momence
Monmouth
Monticello
Morris
Morrison
Mound City
Mounds
Mount Carmel
Mount Carroll
Mount Olive
Mount Pulaski
Mount Sterling
Mount Vernon
Murphysboro
Naperville
Nashville
Nason
Nauvoo
Neoga
New Boston
Newman
Newton
Nokomis
North Chicago
Northlake
O'Fallon
Oak Forest
Oakbrook Terrace
Oakland
Oglesby
Olney
Oneida
Oregon
Orient
Ottawa
Palos Heights
Palos Hills
Pana
Paris
Park City
Park Ridge
Paxton
Pekin
Peoria
Peru
Petersburg
Pinckneyville
Pittsfield
Plano
Polo
Pontiac
Princeton
Prophetstown
Prospect Heights
Quincy
Red Bud
Robinson
Rochelle
Rock Falls
Rock Island
Rockford
Rolling Meadows
Roodhouse
Rosiclare
Rushville
Salem
Sandwich
Savanna
Sesser
Shawneetown
Shelbyville
Silvis
South Beloit
Sparta
Spring Valley
Springfield
St. Charles
St. Elmo
St. Francisville
Staunton
Sterling
Streator
Sullivan
Sumner
Sycamore
Taylorville
Toluca
Toulon
Trenton
Troy
Tuscola
Urbana
Vandalia
Venice
Vienna
Villa Grove
Virden
Virginia
Wamac
Warrenville
Warsaw
Washington
Waterloo
Watseka
Waukegan
Waverly
Wenona
West Chicago
West Frankfort
West Peoria
Wheaton
White Hall
Wilmington
Winchester
Windsor
Witt
Wood Dale
Wood River
Woodstock
Wyoming
Yorkville
Zeigler
Zion

Counties in Illinois

100

Adams
Alexander
Bond
Boone
Brown
Bureau
Carroll
Cass
Champaign
Christian
Clark
Clay
Clinton
Coles
Cook
Crawford
Cumberland
DeKalb
DeWitt
Douglas
DuPage
Edgar
Edwards
Effingham
Fayette
Ford
Franklin
Fulton
Gallatin
Greene
Grundy
Hamilton
Hancock
Hardin
Henderson
Henry
Iroquois
Jackson
Jasper
Jefferson
Jersey
Jo Daviess
Johnson
Kane
Kankakee
Kendall
Knox
Lake
LaSalle
Lawrence
Lee
Livingston
Logan
Macon
Macoupin
Madison
Marion
Marshall
Mason
Massac
McDonough
McHenry
McLean
Menard
Mercer
Monroe
Montgomery
Morgan
Moultrie
Ogle
Peoria
Perry
Piatt
Pike
Pope
Pulaski
Randolph
Richland
Rock Island
Saline
Sangamon
Schuyler
Scott
Shelby
St. Clair
Stark
Stephenson
Tazewell
Union
Vermilion
Wabash
Warren
Washington
Wayne
White
Whiteside
Will
Williamson
Winnebago
Woodford