Healthy birds and a profitable flock start with the right building. O’Neil Metal Buildings & Barndominiums designs and builds commercial poultry houses, including layer houses and broiler houses, for growers across Illinois, Missouri, and the St. Louis region. We also build smaller chicken barns for farms and family flocks. We are based in Belleville, IL, serve a roughly 200-mile area, and have been building for 50 years.
Poultry Buildings We Build
- Commercial layer houses for egg production
- Commercial broiler houses for meat birds
- Pullet and brooder buildings
- Smaller chicken barns for farm, specialty, and family flocks
- Feed, bedding, and equipment storage to support the operation
- Combination farm buildings that pair birds with storage or a work area
Turnkey Poultry Barn Construction
With O’Neil’s turnkey design-build service, one team:
- Designs the building around your flock, your equipment, and your site
- Provides engineering and stamped drawings as required
- Handles all permitting
- Builds it, including concrete, framing, and MEP when needed
Commercial growers who raise birds for an integrator or a buyer often have to meet building requirements. Bring those specifications to the first meeting. We will plan the shell, openings, and power around them. See our process.
Plan Ventilation and Systems Before the Shell
Ventilation is not something to add after a poultry building is up. Airflow, temperature, and air quality drive bird health and performance, so we plan the building around your ventilation approach from the start. During design we look at:
- Building width and length for the airflow pattern you plan to use
- Fan and inlet openings framed into the walls where your system needs them
- A tight building envelope, so air moves where the system sends it
- Insulation in the walls and roof for steadier temperatures
- Electrical service for fans, lighting, heat, feeders, and waterers
- Concrete floors where you need easy cleaning
- Doors and access for cleanout equipment, bedding, and feed deliveries
We coordinate the building with the feeding, watering, and ventilation equipment you or your supplier choose.
Why Post Frame Works for Poultry
Post frame construction gives poultry buildings long, open interiors without interior walls, and it adapts easily to wall openings, insulation, and future additions. It is the same proven system we use for our agricultural buildings. For larger spans, we also build pre-engineered metal buildings.
Durable, Easy-to-Clean Finishes
Poultry buildings face washdowns, dust, and heavy daily use. Options include:
- Metal roofing and siding with a lifetime paint warranty
- Liner panels and interior finishes chosen for cleaning
- Wainscot to protect lower walls
- Overhangs to shield sidewall openings from rain
- Walk doors, sliding doors, and roll-up doors
- Colors and trim from our materials and finishes
Poultry Barn Kits for DIY Builders
Have your own crew? O’Neil sells poultry building material kits with framing lumber, columns, trusses, metal, and windows and doors, with insulation and interior stud framing as options. Each kit comes with detailed construction drawings. These are construction drawings, not structural or engineered drawings. Kits deliver across our service area and to Chicagoland. See our pole barn kits and steel and lumber supply.
Planning for Growth
Many commercial operations start with one house and add more. We can lay out your site so a second building, a storage building, or an addition fits cleanly later, with room for trucks, feed bins, and cleanout.
Serving Farms Across Illinois and Missouri
We build poultry and livestock buildings throughout Southern and Central Illinois, the Metro East, and Eastern Missouri. See pole barns in Illinois, pole barns in Missouri, and our financing options.
Start Your Poultry Building
Tell us about your flock, your equipment, and your site. Call O’Neil Metal Buildings & Barndominiums at (618) 337-6100 or request a free quote.
Frequently Asked Questions
Do you build commercial poultry houses?
Yes. O’Neil builds commercial layer houses and broiler houses for growers, plus pullet and brooder buildings, feed and equipment storage, and smaller chicken barns, in post frame and metal.
Is post frame a good choice for a chicken barn?
Yes. Post frame gives long, open interiors and adapts easily to fan and inlet openings, insulation, and future additions.
Can you build to my integrator’s specifications?
Bring your integrator’s or buyer’s building requirements to the first meeting. We plan the shell, openings, and electrical service around them and coordinate with your equipment supplier.
Do you handle permits and engineering?
Yes. Our turnkey service includes design, engineering and stamped drawings as required, all permitting, and construction, including MEP when needed.
Do you sell poultry barn kits?
Yes. Kits include framing lumber, columns, trusses, metal, windows and doors, with optional insulation and interior stud framing. Kits come with detailed construction drawings, which are not structural or engineered drawings.
Where do you build poultry buildings?
O’Neil is based in Belleville, IL and builds within roughly 200 miles, including St. Louis, the Metro East, Illinois, and Missouri. Kits also deliver to Chicagoland.