Custom Buildings & Post-Frame Structures
Garages, workshops, and barns built to your exact specifications across Bonduel, Shawano, Green Bay, and beyond.
Why Choose Bontrager Exteriors for your New Build?
Versatility for Every Need
Whether you need a simple detached garage for extra storage, a massive agricultural pole barn, or a modern “barndominium” for living space, we have the design flexibility to make it happen. We don’t just sell kits; we build custom structures tailored to the specific dimensions of your lot and the requirements of your lifestyle.
Turnkey Project Management
Building a new structure involves a lot of moving parts. We simplify the process by managing the project from the ground up. From site preparation and concrete foundations to the final installation of doors and windows, we coordinate the details so you don’t have to juggle multiple contractors.
Rugged Post-Frame Construction
We specialize in post-frame (pole barn) construction, the most efficient and durable method for detached structures in Wisconsin. This building style allows for wide-open interior spans without load-bearing walls, giving you maximum usable space for parking tractors, storing boats, or setting up a workshop.
Professional Custom Building Services
At Bontrager Exteriors, we specialize in bringing your vision of the perfect outbuilding to life.
We combine heavy-duty timber columns with high-strength steel roofing and siding to create structures that are virtually maintenance-free. Our team is experienced in insulating and finishing interiors for year-round use, or providing “cold storage” shells for equipment protection. We pay attention to the details—like wainscoting, cupolas, and lean-tos—that take a simple barn and turn it into a property feature.
With over two decades of experience, we build structures that stand straight and hold up against the harshest Midwest weather.
Project Gallery
See our completed custom builds. Full project details coming soon.
New Construction Custom Building
Waupaca, WI
Custom Workshop with Porch
Black Creek, WI
New Construction Office and Workshop
Townsend, WI
What to Expect When
You Work with Us
When you choose to work with us, we want you to feel confident, informed, and supported from start to finish. Our process is simple, transparent, and designed to keep your project moving smoothly at every stage.
Property Visit and Inspection
One of our team members visits your property to assess the scope of your project and take measurements,
Free Estimate
We provide a transparent and detailed proposal based on your preferences and project needs,
Pay Deposit and Join Project Queue
Sign the proposal and pay the deposit to secure your spot in our current project scheduling timeline.
Schedule Confirmation
Closer to your project window, we confirm a specific date range for installation and make sure everything is ready to go.
Project Installation
Our experienced team completes your project with precision and care, ensuring all details are done to satisfaction.
Invoice Balance
Upon the successful closing Of the project, you receive the final invoice and pay the remaining balance,
Share Your Experience
Help others make informed decisions by sharing your honest experience online and with those you know!
We Keep Promises and Customers Notice
Property owners from Shawano consistently praise our professionalism, clean job sites, and dependable crews.
… It was an unusual experience. Mark said the crew would be there at 8:00 am, and they were! … The work was done at a reasonable price and completed within budget. The property was free of any waste once they were done. The whole project was completed by 5:00 pm. I can’t say enough about what a pleasure it was working with Mark and the crew!!!
We chose Allen Bontrager for the metal siding and roof on our lake house, and it’s absolutely beautiful. The team does timely, quality work, and we could not be more pleased with the finished product. We highly recommend their metal siding and roofing products, and you could not ask for a more professional team. Thank you, Allen Bontrager Carpentry!
They did an awesome job on our roof. They worked very hard and they got it done as they said they would in the same timeframe that they had told us I would totally suggest hiring them. They do awesome work and great guys. Very nice!
Everyone we interacted with from Mark who came out to give our estimate to the entire crew who were polite, worked hard and fast, and were very helpful with any questions. The new roof and door wrappings look great and the price was very fair. We were very happy with the entire operation and did already recommend to a friend and we will use them again when needed. Great job!
Allen Bontrager Carpentry did a fantastic job for us after a tornado hit our home. They installed a textured steel roof that looks timeless and classy along with providing lifetime performance and durability. Everyone was honest, timely, responsive, accommodating and hard-working. We couldn’t have been more pleased with the services they provided.
Frequently Asked Questions
What types of custom buildings do you construct?
We design and build a wide range of custom buildings in Wisconsin, including custom garages, pole barns, barndominiums, workshops, storage buildings, RV and boat storage buildings, agricultural barns, and commercial warehouses. Whether residential, agricultural, or commercial, our team provides professional post-frame and stick-frame building construction throughout Shawano, Green Bay, and Appleton.
How much does it cost to build a custom garage or pole barn in Wisconsin?
The cost of custom building construction depends on size, materials, site conditions, insulation, and finish level. A basic pole barn in Shawano or Antigo may start at a lower price per square foot, while insulated workshops or barndominiums in Green Bay or Appleton will vary based on features. We provide detailed estimates so you understand the full scope before moving forward.
What is the difference between a pole barn and a stick-framed building?
Pole barns (post-frame buildings) use large structural posts set into the ground, allowing wide-open interior spans and cost-effective construction. Stick-framed buildings use stud walls and traditional foundations, offering more finishing flexibility. As an experienced custom building contractor serving Wausau and Door County, we help you choose the right building method for your project.
How long does it take to complete a custom building?
Timelines vary based on building size and complexity. Small garages or storage buildings may take a few weeks, while large barndominiums or commercial buildings in Green Bay and Appleton may take several months. We provide a clear construction schedule during the planning phase so you know what to expect.
Can you help with building design and layout?
Yes. Many clients come to us with only a general idea. We assist with custom building design, layout planning, site placement, exterior finishes, insulation options, and door and window placement. Our goal is to create a functional, durable building tailored to your needs in Shawano, Antigo, or surrounding areas.
Can you add in-floor heating or spray foam insulation?
Yes. We specialize in in-floor radiant heating systems and closed-cell spray foam insulation, which improve comfort and energy efficiency. These upgrades are especially popular for heated garages, workshops, and barndominiums in Wisconsin’s cold climate.
Can you match my new building to my home?
Absolutely. We offer a wide variety of metal siding, roofing options, trim packages, and color selections so your new building complements your home or other structures. Many homeowners in Appleton and Door County want cohesive exterior design, and we make that possible.
How durable are your custom buildings in Wisconsin weather?
Our custom buildings are engineered to withstand Wisconsin snow loads, freeze-thaw cycles, and high winds. Proper site preparation, structural framing, and quality exterior materials ensure long-term performance for homes, farms, and businesses in Shawano, Green Bay, and Wausau.
Who performs your new building construction?
All new building construction projects are performed by our sister company, Quality Construction, a trusted Wisconsin building contractor specializing in custom garages, pole barns, barndominiums, workshops, and commercial buildings.
To learn more about their building services, visit: https://qualconstruct.com/buildings
This partnership ensures your project is handled by a dedicated team focused exclusively on professional custom building construction in Wisconsin.
What Services and Service Areas Do You Cover?
We are Wisconsin construction contractors specializing in custom garage construction, pole barn building, barndominiums, post-frame buildings, and complete custom building construction services. If you are searching for a “pole barn builder near Appleton” or a trusted custom building contractor in Shawano or Green Bay, our team delivers durable, professionally engineered structures built for Wisconsin conditions.
In addition to expert custom building construction, we provide metal roofing, shingle roofing, metal and vinyl siding, window and door replacement, seamless aluminum gutters, and custom deck construction. We proudly serve homeowners, farmers, and business owners throughout Shawano, Green Bay, Appleton, Antigo, Wausau, and Door County, delivering high-quality exterior and building solutions across Northeast and Central Wisconsin.
Ready to transform your home’s exterior?
Request your free estimate or get an instant online quote today and experience why so many homeowners in the Shawano area trust Bontrager Exteriors.