1 set of Heavy Duty 16" drawer slides
1 - 1x3 @ 8 feet long
1 - 3/4" plywood 16" x width of drawer
You may need to modify or alter this tutorial depending on the type of vanity you use. Optimally, use a vanity with 6" toekick, as shown, with a full overlay door.
Please read through the entire plan and all comments before beginning this project. It is also advisable to review the Getting Started Section. Take all necessary precautions to build safely and smartly. Work on a clean level surface, free of imperfections or debris. Always use straight boards. Check for square after each step. Always predrill holes before attaching with screws. Use glue with finish nails for a stronger hold. Wipe excess glue off bare wood for stained projects, as dried glue will not take stain. Be safe, have fun, and ask for help if you need it. Good luck!
Remove any doors from the vanity as shown in the picture.
Depending on how your toekick is installed, remove it with a hammer, taking great care to not damage the toekick. My toekick was held in place with plastic corners, stapled, no glue.
Turn a builder grade vanity into a child friendly vanity by converting the toekick to a step drawer. Also could be used to create a storage drawer, increasing the storage in the bathroom.
Measure the opening left from removing the toekick. In my case, that's 22 3/4" wide. I also took a height measurement to confirm I would need to use 1x3 boards to build the step drawer.
Also take a second to confirm that the opening is at least 16" deep - otherwise, you will need to adjust your drawer depth and use shorter slides.
Once you know the overall width of the step drawer, cut a 1x3 to this length. Then cut two 1x3s @ 15 1/4" for the sides. If your toekick is not cut out like mine, you could also add a front to the step drawer box, so a second 1x3 the width of the opening, minus 1".
Now simply attach 3/4" plywood on top, and nail down with glue and 2" nails.
Once your step drawers have been built, attach the slides as directed by the slide manufacturer. Preferably, use side mount slides, with a weight rating exceeding 100lbs.
With the step drawer built, install in the drawer opening with drawer slides, placed to the tallest possible position. Attach toekick to step drawer (I used a couple of 2" finish nails to hold it on, removed the drawer and marked it, and then attached with the Kreg Jig).