How to Build Pull-Out Drawers Under Stairs

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.

Using the measurements taken in the previous step, calculate the precise width, height, and depth of each drawer box. Factor in the space needed for the drawer slides, typically adding the slide's thickness to the drawer box dimensions. Decide on the type of drawer slides (e.g., ball-bearing, epoxy-coated) based on the expected load and desired smoothness of operation. Consider full-extension slides for maximum access to the drawer's depth. You may want to sketch out a design or use design software to visualize the final setup.

Based on your design and budget, select the materials for the drawer boxes. Plywood (e.g., birch, oak) is a common choice for its stability and strength. For a more budget-friendly option, consider MDF or particle board, though they may be less durable. Select drawer slides that match the designed dimensions and weight requirements. Also, purchase screws, wood glue, and any necessary bracing or support materials for installation.

Using a table saw or circular saw, carefully cut the plywood or other chosen material into the required pieces for each drawer box. Ensure all cuts are square and precise to facilitate easy assembly and a good fit. You will need to cut: two side panels, one front panel, one back panel, and a bottom panel for each drawer. Double-check all measurements before cutting.

Apply wood glue to the edges of the side, front, and back panels where they will join. Assemble the four sides of each drawer box, ensuring they are square. Use clamps to hold the pieces together while you pre-drill pilot holes and drive screws to secure the joints. Attach the drawer bottom by sliding it into pre-cut grooves or by screwing it to the bottom edges of the assembled sides. Ensure the bottom is securely fastened for rigidity.

Separate the inner and outer members of the drawer slides. Attach the inner member (the part that attaches to the drawer box) to the sides of each assembled drawer box. Use a measuring tape and pencil to mark the precise location for the slides, ensuring they are parallel to the bottom edge of the drawer and setback from the front edge according to the slide manufacturer's instructions. Pre-drill pilot holes and secure the slides with the provided screws.

Measure and mark the positions for the outer members of the drawer slides on the interior walls of the staircase opening. These marks must be perfectly parallel to each other and level. Use a level and measuring tape to ensure accuracy. Pre-drill pilot holes into the studs or framing members and securely fasten the outer slide members using appropriate screws. Ensure the spacing between the slides matches the dimensions of the drawer boxes.

If you are adding decorative drawer fronts, attach them to the front panel of each drawer box. This can be done from the inside of the drawer box by screwing through the front panel into the drawer front material. Ensure the drawer front is centered and has consistent reveals (gaps) around its edges relative to the opening and adjacent drawers. This step requires careful alignment to achieve a professional look.

Carefully align the drawer boxes with the installed outer members of the drawer slides. Gently push the drawers in until they fully engage with the slides. Test each drawer by opening and closing it several times. Check for any sticking, binding, or excessive looseness. Make any necessary adjustments to the slide alignment or drawer box dimensions if issues are found.

If the drawer fronts or boxes are unfinished, apply paint, stain, or a protective sealant according to the manufacturer's instructions. Allow adequate drying time between coats. Once the finish is dry, you can install drawer handles or knobs if desired. Ensure they are centered and securely attached. Clean up any dust or debris from the work area.