Custom Barndominiums,
Built the O’Neil Way
A barndominium is more than a trend—it’s a lifestyle. Merging the bold silhouette of a barn with the comforts and aesthetics of modern living, it offers something few traditional homes can: flexibility, open space, and a structure built for efficiency and durability. At O’Neil, we help you bring that vision to life—tailored to your tastes and engineered to last.
Built to Last—Quality in Every Detail
When you build a barndominium with O’Neil, you’re not just getting a shell; you’re getting a home that’s engineered for strength, comfort, and beauty. We use premium post-frame and steel construction methods complemented by high-performance insulation, weather-resistant siding and roofing, energy-efficient windows, and interior finishes selected to match your style. Our materials are chosen to minimize maintenance, maximize longevity, and make sure your barndo feels like home from day one.
Barndominium Features & Benefits
- Open-plan flexibility – Without load-bearing interior walls, your floor plan can evolve as your needs change.
- Durability & low maintenance – Metal exteriors resist rot, pests, fire, and severe weather, keeping upkeep low over time.
- Cost-efficient construction – Because the structural system is simpler than conventional framing, you often save on labor and materials.
- Energy efficiency – With proper insulation and sealing, barndominiums can deliver comfortable performance and reduced utility bills.
- Customization & expansion – Need a workshop, loft, or attached shop? The structure is easy to adapt and expand later.
Is a Barndominium Right for You?
Our buildings all look good, but the real beauty of working with O’Neil Building Systems is expressed in our philosophy: “If you can dream it, we can build it!” And that’s exactly what we’ve been doing for satisfied customers in Illinois, Missouri, and parts of the Midwest.
Here you can learn more about the wide variety of materials and options available to create the building you want. And if your dream building includes a design feature you don’t see here, give us a call at (800) 489-6533 or (618) 337-6100.Chances are we can include it as a part of your new building!
Ready to Design
Your Barndominium?
Let’s turn your vision into reality. Reach out today to explore floor plans, material options, financing, and timelines.
Let’s build something extraordinary together.