How Much Does a 20×20 Slab of Concrete Cost? (2026 Pricing Guide)
A 20×20 concrete slab gives you 400 square feet of solid, flat surface — enough for a two-car garage floor, a generous patio, a shed foundation, or a small section of driveway. It’s one of the most common pours homeowners order, and the price is more predictable than most outdoor projects. So how much does…