Shop Floor Concrete in East Idaho: Thickness, Cost & What a 30x40 Slab Runs
By Carter Built Construction · Updated July 12, 2026
Shops, pole barns, and ag buildings are a way of life in East Idaho — and the floor is what makes the building usable year-round. Here's how we spec and price shop floors for homeowners, farmers, and business owners across the region.
How thick does a shop floor need to be?
Thickness should match what will actually sit on the slab:
- 4 inches — light use: cars, small tractors, workshop tools
- 5–6 inches with reinforcement — pickups, trailers, farm equipment; the most common spec we pour
- 6–8 inches with engineered reinforcement — heavy trucks, loaders, lifts, and commercial use
What shop floors cost in East Idaho
Most shop floors in our area land in the $6 to $10 per square foot range installed, depending on thickness, reinforcement, base prep, and finish. As real-world reference points, a 30x40 shop floor (1,200 sq ft) typically runs roughly $9,000 to $15,000, and a 40x60 floor (2,400 sq ft) scales proportionally — with per-foot pricing usually improving a little on bigger pours.
Add-ons that change the number: floor drains and sloping the slab to them, thickened footings or equipment pads, in-floor heat tubing, and a burnished or epoxy-ready finish. If you're planning epoxy later, tell your concrete contractor before the pour — the finish and curing method matter for coating adhesion.
What makes a shop floor last here
The floor is only as good as what's under it. We build on compacted gravel base, use air-entrained mixes rated for our climate, place reinforcement correctly (in the slab, not on the ground), and cut control joints on a proper pattern so cracking happens where it's supposed to. For shops where vehicles come in covered in snow and road salt, a penetrating sealer is cheap insurance for the surface.
Common Questions
Do you pour floors for existing buildings, or only new construction?
Both. We pour floors in existing pole barns and shops, replace cracked or heaved slabs, and pour complete pads with footings for new buildings. If an old floor failed, we diagnose why — usually base or drainage — and fix the cause before the new pour.
Should I put floor drains in my shop?
If you'll wash vehicles or equipment inside, or park snow-covered rigs, yes — a drain with properly sloped concrete keeps the floor dry and safe. Drain plumbing needs to be roughed in before the pour, so plan it early.
Can you pour a shop floor in winter?
Often, yes — inside an enclosed building, winter pours are very manageable with heat and blankets. An enclosed shell actually gives us more control than an open-air summer pour in the wind.
Planning a project in East Idaho?
Carter Built Construction gives free, no-obligation estimates in Idaho Falls, Pocatello, Rexburg, and throughout the region.