Step 1 · Measure and Plan Staircase Opening

Carefully measure the width, height, and depth of the available space under the staircase for each drawer. Use a tape measure and a pencil to mark the dimensions. Note any irregularities in the space, such as sloping floors or angled walls. Also, identify and mark the locations of any existing framing members (joists, studs), electrical wires, or plumbing that might interfere with drawer installation. These measurements are critical for designing the drawer boxes and ensuring they will fit properly.