Concrete Stairs Cost Calculator

Concrete stairs typically cost $300 to $800 for materials for a standard 3 to 5 step entry staircase. Ready-mix concrete is about $125 to $165 per cubic yard. A 36-inch wide staircase with 10 steps (7-inch rise, 11-inch run) uses about 3.27 cubic yards with 10% waste.

Building codes typically require a maximum rise of 7.75 inches and minimum run of 10 inches. The most comfortable dimensions are a 7-inch rise with an 11-inch run. The rule of thumb is: rise + run = 17 to 18 inches. All steps must be uniform in height and depth.

Interior stairs require a minimum width of 36 inches per most building codes. Exterior entry stairs are typically 36 to 48 inches wide. Commercial and public stairs require 44 inches minimum. Wider stairs (48 to 60 inches) provide a more grand and comfortable feel.

Yes, concrete stairs need a compacted gravel base or a concrete footing to prevent settling and cracking. The base should extend below the frost line in cold climates. A 4 to 6 inch gravel base with proper drainage is standard for most residential applications.

Build stair forms using 2x8 or 2x10 lumber for the sides and risers. Stake and brace the forms securely. The bottom form should be angled at the stair slope. Install rebar grid for reinforcement. Pour from the bottom step up, using a slightly stiff mix to prevent slumping.