How To Build a Bathroom Sink Cabinet

The first step to consider when planning a bathroom sink cabinet whether you intend to build the cabinet from scratch or to purchase a pre-made cabinet from your local building supply center. In this article, we will assume you have chosen a pre-made cabinet.

Store-bought cabinets come in a variety of widths, but with a standard depth of about twenty inches. The bathroom sink cabinet is first centered around the water supply lines and the plumbing drain, then leveled and attached to the wall. Screw the back of the cabinet to the studs in the wall, and shim it up at the floor if necessary.

Once the bathroom sink cabinet is attached to the wall, it's time to install the sink top. There are many different types of sink tops, ranging from precast sink and countertop combinations to fully tiled sink tops with a sink installed over the tile.  Precast sink tops are simply attached to the bathroom sink cabinet; they come ready to connect to the plumbing.

If you choose to tile the sink top and to set the sink into your tile, there are a few additional steps involved:

  • Cut a piece of three quarter inch plywood to fit the top of the bathroom sink cabinet.
  • Cut holes for the sink and the faucets.
  • Install ceramic tile over the plywood, making sure there is clearance for the sink and faucets.
  • After the tile has set, grout the tile then set the sink into the hole in the countertop using a bead of plumber's putty between the sink and the surface of the tile.
  • If the sink came supplied with clips, secure these to the underside of the countertop at this time.

The next step is to make the plumbing connections:

  • Hook up the drain to the existing drain pipe in the wall and tighten all fittings.
  • Set the faucet in the appropriate holes in the top of the bathroom sink cabinet and secure it from underneath with the hardware provided. Note: the hot water is always plumbed to the left-hand faucet.
  • Connect the water supply lines to the existing plumbing and to the faucet.
  • Hook up the drain stopper to the upright handle in the center of the faucet.
  • Turn on the hot and cold supply lines and check for leaks.
  • Finally, clean and dry the tile and apply a bead of silicone caulking around the rim of the sink and where the bathroom sink cabinet meets the wall.


Share this article!

Follow us!

Find more helpful articles: