We say take the doors off of those sink cabinet bases and let it all hang out. Why? Because the area below the sink tends to become musty so no doors mean better ventilation. Also, typical sink bases don’t have a shelf – so they’re useless for storage.
Our vanity design features open storage below the sink. Doing so is rather simple: design two 33″ sink bases with two 18″ drawer cabinets at the ends – and a 30″ door and drawer cabinet for the center. All storage needs are covered: small items (drawers), larger items not typically displayed like cleaning supplies (middle cabinet) and items needed at easy reach, such as toiler paper or towels (open shelves).
The 33” sink bases will have to be modified: first remove the doors. A ½” thick (24”x 30”) thick IKEA Cover Panel must be cut and installed along the sink base interior to achieve the “matching interiors look”. Consider that cabinets come in birch and white, so if using the corresponding door colors this step is not necessary.
Then a 5/8” thick (3’x8’) IKEA Cover Panel is used to build a 2 ½” thick center shelf and to install at the bottom of the cabinet to match the shelf thickness. Lastly a matching IKEA Plinth or – matching edge banding – is used to build a frame along the edges to cover the panel seams. Keep in mind that a small portion of the plumbing might be visible.
Here’s the measurement information:
IKDO 