40x90x16 Insulated Shop
Seneca, Illinois
40x90x16 fully insulated post frame shop built in Seneca, Illinois for year-round use with 16-foot sidewalls and 3,600 sq ft of workspace.
View Project →Serving LaSalle, Grundy & Kendall Counties — Ottawa, Morris, Peru, Minooka, Yorkville, Oswego, Marseilles
Custom post frame garages, shops, and agricultural buildings built for Illinois weather, real-world use, and long-term value.
Serving LaSalle, Grundy & Kendall Counties — with local projects in Ottawa, Morris, Peru, Minooka & surrounding areas.
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Start Your Project
Tell us a little about your building and we’ll follow up to discuss your project.
Why Choose A15
A15 Carpentry builds post frame structures for homeowners, farmers, and property owners throughout Ottawa and the surrounding area.
From simple storage buildings to insulated shops with overhead doors and interior finishes, the goal is straightforward: build it strong, build it clean, and build it to last.
Curious about post frame building cost in northern Illinois? Try the pole barn estimator to explore size, features, and finish options before requesting a quote.
Custom buildings for storage, work space, equipment, and everyday use with layouts designed around your project goals.
Garages for vehicles, tools, storage, and hobby space with upgrade options for insulation and interior finishes.
Practical shop buildings for contractors, homeowners, and equipment owners who need dependable usable square footage.
Machine sheds, farm storage, and utility buildings built to handle Midwest weather and day-to-day use.
Recent Projects
Recent work across northern Illinois, shown with real project photos from completed builds.
Seneca, Illinois
40x90x16 fully insulated post frame shop built in Seneca, Illinois for year-round use with 16-foot sidewalls and 3,600 sq ft of workspace.
View Project →
Braidwood, Illinois
50x100 fully insulated post frame shop built for year-round use with concrete floor, wall insulation, metal liner panels, and a fully insulated attic.
View Project →
Ottawa, Illinois
32x64 barndominium combining residential living space with functional shop and storage area, featuring a covered porch and attached garage.
View Project →
Ottawa, Illinois
36x64 post frame garage built in Ottawa, Illinois for dependable vehicle storage, equipment space, and everyday utility.
View Project →Pricing Tool
Use our building estimator to explore size, features, and finish options before requesting a quote. It's a fast way to get a ballpark range for your post frame project in Illinois.
What You Can Configure
Customer Reviews
”From the first phone call to the final walk-through, A15 Carpentry kept us informed at every step. The workmanship on our building was top-notch and the crew was professional and respectful of our property.”
”Austin and his crew are honest, skilled, and easy to work with. Our building is solid — built to handle Illinois winters — and the finished product exceeded what we expected.”
”Communication was outstanding throughout the entire project. They showed up when they said they would, the build stayed on schedule, and the quality of the finished structure speaks for itself.”
Learning Center
Building a pole barn, shop, or post frame garage involves a lot of decisions — foundation type, door sizes, insulation, concrete, permits, and more. The A15 Carpentry Learning Center walks through each stage in plain English so you know what to expect before you sign a contract.
Written for Illinois homeowners, landowners, and shop buyers who want a durable building done right the first time.
Areas We Serve
A15 Carpentry proudly serves homeowners, farmers, and property owners throughout northern Illinois.
We regularly work in Ottawa, Peru, Marseilles, Morris, Minooka, Channahon, Yorkville, Oswego, Newark, and Norway.
Let's Talk
If you're planning a pole barn, garage, shop, or agricultural building, contact A15 Carpentry to discuss your project.