4-inch reinforced standard
Included1,680 sq ft slab footprint.
Open base estimatePost-frame shop
30x40 Porch Shop
30x40 enclosed, 1,200 sq ft, plus 12 ft porch
A 30x40 post-frame shop with a 12 ft covered front porch, a 40x42 reinforced slab, doors, windows, permit, and final inspection.
Published starting price$39,900
Published base scope
What the starting price covers
The signed specifications identify final selections, quantities, allowances, and exclusions.
- 4-inch reinforced 40x42 slab
- 12 ft covered front porch
- 9x8 overhead door
- Service door and three windows
- Permit and final inspection
Concrete and comfort
Choose the slab package by size
Cartwright publishes a 4-inch reinforced slab as the standard wherever the model includes concrete. Final thickness, reinforcement, base, edges, and concrete strength follow the confirmed loads, soils, use, local requirements, and approved plans.
6-inch reinforced slab
+$6,700$4 per sq ft across 1,680 sq ft, rounded to the nearest $100.
Add 6-inch slabHydronic radiant heat
+$22,300Planning allowance for 1,200 heated sq ft. Includes under-slab insulation, PEX, manifolds, controls, and a sized heat source.
Add radiant heatRadiant pricing assumes a new slab and is finalized after heat-loss design, zoning, utilities, and equipment selection. Site preparation, foundations, thickened edges, equipment pads, and special loading requirements are confirmed in the project scope.
Next step
Put this building on your property.
Configure the model, share the property, and send the request. Cartwright reviews the site and scope before confirming the complete contract price.