We pour slabs for sheds, shops and garages and footings for additions in the Sioux Falls area. The city's code lists a 42 inch frost line, which decides whether a job needs footings or can float on a gravel base. Tell us what will sit on the slab.
In Sioux Falls the frost line sets the rules for anything that holds up a building. The city's building code lists a frost line of 42 inches, and foundations must reach below it or use an approved frost-protected design. That is why a garage, an addition or a house here sits on footings and frost walls and not on a plain slab on the surface.
A slab that only carries itself is different. A shed pad, a patio or a floor inside an existing frost wall can float on a compacted granular base. The details still matter: a base that drains, the right thickness for the load, steel or mesh where needed and a vapor barrier under any floor that will be enclosed or heated. Tell us what will sit on the slab, such as a vehicle, a lift, a hot tub or shelving, and we size it for that.
Structural work is built to the permit drawings and inspected by Building Services before and after the pour. The city lists sheds over 200 square feet as needing a building permit, while smaller ones need a zoning placement permit. We tell you at the estimate which kind of slab your project is and what the city will want to see.
Slabs & foundations in Sioux Falls: common questions
How deep do footings have to be in Sioux Falls?
The city's building code table lists a frost line depth of 42 inches. Footings for a building must extend below the frost line or follow one of the frost-protected methods the code allows. Building Services confirms the detail on your permit.
Can a garage sit on a floating slab here?
That depends on the size and whether it is attached, and the city decides it at permit review. An attached garage is part of the house and gets frost footings. Ask before you plan around a simple slab.
Do I need a vapor barrier under the slab?
Yes for any floor that will be enclosed, heated or covered with flooring. The clay soil here holds moisture, and it moves up through bare concrete. An open patio or driveway does not need one.
How it works
- Free estimate: Call, text or book online. We visit and measure.
- Written quote: Clear pricing with finish options.
- Prep & forms: We excavate, grade, compact the base and set forms and reinforcement.
- Pour, finish & cure: We pour, finish, cut control joints and tell you when you can use it.