Build Your Estimate
Adjust the inputs — pricing updates instantly.
Get a realistic budget range for your building in minutes.
This is a planning tool. Final pricing depends on site conditions, engineering, and material selections.
Start Your EstimateAdjust the inputs — pricing updates instantly.
Share a few project details and we'll follow up with next-step pricing tailored to your site, engineering, and finish choices. Your current estimator selections are sent with the form.
We'll review your inputs and follow up with a tailored quote. If you'd like to talk sooner, call or text 815-587-4324.
Most post frame buildings in Illinois land somewhere between $23 and $35 per square foot for the shell, before upgrades like insulation, concrete, premium doors, or custom finishes. The biggest levers on final pole barn cost are size, wall height, roof pitch, foundation type, and the level of finish inside. A 40×60 shop in Ottawa, Peru, or Morris can look very different than a 24×40 garage in Yorkville once you factor in concrete, insulation, and overhead door specs.
A15 Carpentry builds post frame garages, shops, agricultural buildings, and barndominiums across north-central Illinois — Ottawa, Marseilles, Mendota, Streator, Minooka, Dwight, Morris, Peru, and the surrounding communities. This estimator uses real pricing logic from our recent projects so the ranges you see reflect what pole barns actually cost in this market right now, not national averages.
The numbers on this page are budget-planning ranges, not line-item quotes. Site conditions, soil, permitting, engineering, delivery distance, and finish selections all move final pricing. When you're ready for a real number, use the form above and we'll follow up with a tailored estimate.