New concrete foundation at sunset in Lee's Summit, MO — reinforced slab and sitework for a commercial construction project

Concrete Foundations & Sitework in Lee's Summit, MO

LS Concrete Contractors handles concrete foundations, slabs, and sitework for residential additions, commercial properties, and outbuildings in Lee's Summit and the surrounding Kansas City metro. Foundation concrete here has to account for KC's frost depth and expansive clay.

Call (816) 608-7761 Get in Touch

Free Estimates Lee's Summit + KC Metro Residential + Commercial

Free Estimate

Tell us about your project.

Same-day response. No obligation.

The Finished Project

A foundation built to KC frost depth and clay soil conditions.

A properly prepared concrete foundation — footings below the frost line, drainage designed before the pour, mix specified for the load — gives a structure the stable base it needs to perform for decades. Getting these decisions right before the concrete is ordered is what makes the difference.

Call (816) 608-7761

Commercial

What Concrete Foundation and Sitework Covers in Lee's Summit

Concrete foundations in Kansas City need to account for two realities: a frost line around 26 inches that footings must extend below, and expansive clay that puts lateral and uplift pressure on foundation systems. We pour footings, grade beams, monolithic slab-on-grade foundations, and concrete slabs for residential additions and commercial properties.

We work with property owners, general contractors, and developers on foundation and sitework scopes. We handle the concrete portion — footings, slabs, stem walls, and related flatwork — and we scope it to the load and soil conditions of the specific site.

Call (816) 608-7761

Concrete foundation forms with rebar reinforcement — sitework preparation before pour

Common Situations

When Is Concrete Foundation Work Required?

› Residential addition — garage, room addition, or ADU requiring a new foundation
› Detached structure — outbuilding, workshop, or garage needing a slab or foundation
› Commercial property new construction or pad preparation
› Existing foundation requiring extension or modification
› Site preparation for a larger build requiring flatwork
› Replacement of a failed or inadequate existing foundation

Technical Factors

What Concrete Foundations in Kansas City Must Address

Frost Depth

Kansas City's frost line is approximately 26 inches. Footings must extend below this depth to prevent heave from freeze-thaw expansion in saturated soil.

Clay Bearing Capacity

Native KC clay has variable bearing capacity depending on moisture content. Proper compaction and sometimes subbase addition or replacement is required to achieve consistent bearing for foundation loads.

Drainage and Waterproofing

Foundations on KC clay require drainage design — gravel backfill, drainage tile, and proper grading — to manage the water that expansive clay holds after rain events.

Mix Design and PSI

Foundation concrete is typically 3000–4000 PSI for residential applications. Commercial or industrial foundations may require higher PSI and specific admixtures for the intended loads.

Lee's Summit / KC Context

KC Frost Depth and Clay Bearing — The Two Constants in Every Foundation Pour

The 26-inch frost depth and the expansive clay underneath most Lee's Summit properties define the foundation design conversation. Footings that don't go deep enough heave. Foundations poured without adequate drainage behind them experience lateral pressure from saturated clay. These aren't edge cases in this market — they're the standard conditions every foundation pour needs to account for. We scope accordingly.

Pricing

How Much Does Concrete Foundation Work Cost in Lee's Summit?

Foundation and sitework concrete is scoped to the specific project. Residential monolithic slab-on-grade foundations typically run $7–12 per square foot. Footing systems for additions and outbuildings vary based on frost depth requirements (26 inches in KC), soil conditions, and load. Site visits are required before any foundation is scoped — there is no reliable phone estimate for foundation work.

› Foundation type (slab-on-grade, footing system, grade beam)
› Square footage and load requirements
› Frost depth compliance (26-inch minimum in KC)
› Subgrade preparation and soil bearing assessment
› Reinforcement specification (rebar size, spacing, chair placement)
› Cold-weather or hot-weather pour requirements

Step by Step

How We Sequence Foundation and Sitework Concrete Pours

Site Assessment

We review the soil conditions, existing grade, and planned structure load before recommending footing depth, base treatment, and mix design.

Excavation Confirmation

We confirm excavation is to the correct depth and the subgrade is ready to receive concrete. We don't pour until the base conditions are right.

Forming and Reinforcement

Forms are set to the engineered or planned dimensions. Reinforcement (rebar, wire mesh, or fiber) is placed per the scope requirements.

Concrete Pour

Concrete is placed, consolidated, and screeded to elevation. Anchor bolts, embeds, and post-pour inserts are set during this stage.

Curing

Foundation concrete is cured to achieve design strength before loads are applied. Cold-weather pouring requires additional protection protocols.

FAQ

Common questions about this service.

If your question isn't here, call us. We'll give you a direct answer.

(816) 608-7761

What frost depth should KC footings reach?

Kansas City's frost depth is approximately 26 inches. Footings must extend below this depth to prevent heave from ground freezing. For slabs-on-grade with heated spaces below, a perimeter footing below frost depth is standard — the heated slab itself typically doesn't freeze.

What PSI concrete is appropriate for a residential foundation?

Most residential foundations use 3000 PSI concrete. Structural slabs, garage floors, and footings that carry significant loads may spec 3500–4000 PSI. Commercial and industrial foundations often require 4000–5000 PSI depending on occupancy and load.

Can you pour in cold weather?

Yes, with appropriate precautions. Cold-weather concrete pours require heated enclosures, insulated blankets, accelerating admixtures, and careful monitoring of the temperature during the initial cure period. Cold-weather pouring adds cost and complexity — we'll discuss that honestly if the timing makes it necessary.

Do you work with general contractors?

Yes. We work as concrete subcontractors on projects where a general contractor is managing the overall build. We handle the concrete scope — footings, slabs, walls, and related flatwork — and coordinate with the GC on sequencing and access.

What's the difference between a footing and a slab-on-grade?

A footing is a structural element that transfers load from a wall or column to the soil below. A slab-on-grade is a flat concrete floor poured directly on prepared subgrade. Most residential construction uses a combination: footings below the frost line to carry the foundation walls, and either a basement floor or a slab-on-grade inside the foundation.

Service Areas

Foundations & Sitework across the eastern KC metro.

We handle foundations & sitework in Lee's Summit and 11 surrounding cities. Each location has the same base-prep standards and KC-specified mix design.