O’Neil Metal Buildings & Barndominiums is a post-frame contractor based in Belleville, serving southern Illinois. We design, permit and build turnkey post-frame buildings for homeowners, farms and businesses, from Metro East shops and garages to farm buildings and commercial buildings across the southern half of the state.
One team handles your project from the first conversation to the final walkthrough. Request a Design Consultation or call (618) 337-6100.
What a post-frame contractor does for you
Post-frame (pole barn) construction uses large, widely spaced columns tied together with engineered trusses, then wrapped in steel roofing and siding. As your post-frame contractor, O’Neil takes care of the whole job:
- Design. We size the building around how you’ll use it: equipment clearances, door sizes, lean-tos, porches, lofts and room to expand.
- Engineering, drawings and permits. We provide engineering and stamped drawings as required and handle the permit. We can also help with driveway entrance, zoning and floodplain approvals.
- Construction. Our crews set the columns, trusses and girts, then install the steel roof, siding, trim, doors and windows.
- Finish work. Plumbing, HVAC and electrical are done by O’Neil-trained subs when your project needs them.
- Walkthrough. We walk the finished building with you before we call it done.
How we build post-frame buildings
- Bolted trusses. Our trusses are always bolted, never just nailed.
- Steel brackets on concrete. Columns are set on steel brackets on concrete.
- Lifetime paint on qualifying steel roof and wall panels.
- Wide clear spans with no interior load-bearing walls, so you can lay out a shop, barn or warehouse however you like.
Post-frame buildings we build in southern Illinois
- Pole barns, garages and shops. See pole barn garages and pole barns in Illinois.
- Farm and equipment buildings. Machine sheds, hay storage and livestock barns. See agricultural buildings, equipment storage and equestrian barns.
- Barndominiums. Living space and shop space under one roof. See barndominium builders in Illinois.
- Commercial buildings. Shops, storage, offices and flex space. See commercial metal buildings.
Recent post-frame projects near you
- 60′ x 120′ x 16′ pole barn in Millstadt for a repeat customer
- Commercial pole building in Sparta
- 50′ x 80′ x 10′ garage and workshop in Belleville
- Farm post-frame building in Mascoutah
- Meeting hall for the Belleville Jaycees
“The building is straight and sound and I always recommend you to everyone considering a new building.”
Randy, Belleville garage and workshop
See more on recent installations.
Where we work in southern Illinois
We’re based at 5909 Town Hall Road in Belleville and build within roughly 200 miles. In southern Illinois that includes the Metro East (Belleville, O’Fallon, Millstadt, Mascoutah, Columbia, Waterloo, Edwardsville and Collinsville) and communities south and east such as Sparta, Red Bud, Chester, Nashville, Carlyle, Highland, Centralia, Mount Vernon, Carbondale and Marion. Not sure if you’re in range? Call us.
Turnkey or a material kit
Most owners choose turnkey. If you have your own crew, we also sell post-frame kits with framing lumber, columns, trusses, metal, windows and doors, with insulation and interior stud framing as options. Kits include detailed construction drawings (not structural or engineered drawings), so plan for engineering separately if your permit needs it.
Frequently asked questions
What is a post-frame contractor?
A post-frame contractor designs and builds post-frame (pole barn) buildings. At O’Neil that covers design, engineering and stamped drawings as required, permits, construction, and plumbing, HVAC and electrical by O’Neil-trained subs when needed.
Do you build post-frame buildings in southern Illinois?
Yes. We’re based in Belleville and build across southern Illinois, the Metro East and Greater St. Louis, within roughly 200 miles.
Do you handle permits?
Yes. On turnkey builds we handle the permit and provide engineering and stamped drawings as required. We can also help with driveway entrance, zoning and floodplain approvals.
Can I buy a post-frame kit instead?
Yes. See pole barn kits for what’s included.
Start with a design consultation
Our build calendar is limited, so every project gets our full attention. Request a Design Consultation or call (618) 337-6100. Office hours are Monday through Friday, 8:00 AM to 4:30 PM.