Free Tool
Monolithic Slab Cost Estimator
Estimate the full cost of a monolithic concrete slab — including concrete, rebar, vapor barrier, gravel, and labor.
Slab Dimensions
Thickened Edge (Footing)
Unit Costs
$
$
$
$
$
%
What Is a Monolithic Slab?
A monolithic slab (also called a "mono slab" or "thickened-edge slab") is a concrete foundation where the slab and footings are poured together in a single pour. The edges of the slab are thickened to form an integrated footing that supports load-bearing walls.
Monolithic slabs are popular in residential construction — especially in warmer climates where frost depth isn't a concern — because they're faster and cheaper than separate footing-and-slab systems.
Typical Monolithic Slab Costs
| Component | Cost Range |
|---|---|
| Concrete (ready-mix) | $120 – $200 per cubic yard |
| Rebar / wire mesh | $0.50 – $1.50 per sq ft |
| Vapor barrier (6-mil poly) | $0.10 – $0.25 per sq ft |
| Gravel base (4-6 inches) | $0.35 – $0.75 per sq ft |
| Labor (forming, pouring, finishing) | $2.00 – $5.00 per sq ft |
| Total installed cost | $5.00 – $10.00 per sq ft |
Monolithic vs. Stem Wall Foundations
Monolithic Slab
- Single pour — faster construction
- Lower cost ($5-$8/sq ft typical)
- Best for flat lots in warm climates
- Plumbing must be set before pour
- Limited to shallow frost lines
Stem Wall
- Multiple pours — longer timeline
- Higher cost ($8-$15/sq ft typical)
- Works on sloped lots
- Easier to run plumbing/utilities
- Required in cold climates (deep frost)
Estimate and track every pour
ConstructiveCore connects your estimates to actual job costs — so you know exactly how your concrete budget is tracking in real time.