🛠️ How Concrete Contractors Calculate Costs for a 20×20 Slab in Chandler
Thinking about adding a 20×20 concrete slab? Here’s a breakdown of what goes into the cost: 1. 📐 Materials & Volume A standard 4‑inch slab equals around 4.94 cubic yards (20 ft × 20 ft × 0.33 ft). That’s roughly 222 bags of 80 lb concrete and 616 ft of rebar with overlaps included. 2. 💲 Material Pricing Locally In Chandler, concrete typically costs between $125–$148 per yard . Total material cost lands around $2,000–$3,000 , depending on volume and delivery conditions. 3. 👷 Labor Costs Labor for a 400 sq ft slab ranges from $3–$10 per sq ft —meaning $1,200–$4,000 total. Complex designs or difficult site access can push labor costs higher. 4. 🔧 Site Prep & Complexity Things like grading, excavation, slopes, or demo work can increase costs. If an existing slab needs removal, expect additional fees around $1.20–$1.90 per sq ft . 5. 📏 Thickness & Mix Quality Thicker slabs (6–8”) require more concrete, raising total costs to $7–$12 per sq ft . Rebar...
