Vanity (Photo: @LIGHTITUP via Twenty20)

How to Install a Bathroom Vanity

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Vanity (Photo: @LIGHTITUP via Twenty20)
When you bought your house, you promised the bathroom was going to be the first thing you renovated. Whether you’re fulfilling that promise on-time or five years late, you’ll need to know how to install a brand new vanity cabinet. Here’s the step-by-step process.


Don’t waste your time (or break your heart) by falling in love with a new vanity that’s either too big or too small. Before making any important decisions, you need to know the measurements of your space. Measure your current vanity and the available space in your bathroom. Most vanities are between 30 and 32 inches tall; however, modern styles tend to be taller, coming in at around 36 inches.

Uninstall the old vanity

Before you can install your new vanity, you will need to uninstall your old one. When removing your vanity, locate the shutoff values and make sure all the remaining water has been drained from your pipes and the P trap is clean before moving on with the rest of the process.
Depending on your unique unit, you may have to take down a mirror, remove caulking, and remove screws. A vanity is a cumbersome fixture to haul away. Enlist the help of a friend to ensure it always has an adequate amount of support and it is not being dragged along your floors or walls.

Mark where the new vanity will go

Position the new vanity against the wall and mark its outline on the wall with a pencil. Use a stud finder to locate the wall studs and mark them. Discern where the new piping will go, mark it on the vanity, and drill the appropriate holes. Some vanities come with pre-drilled holes. If this is the case, follow the manufacturer’s instructions.

Attach the vanity to the wall

Now the holes are drilled, it is time to attach your new bathroom vanity to the wall using 3-inch drywall screws. Once that is completed, check that the unit is sitting level. If it is, trim the shims with a utility knife. If there are any noticeable gaps along the floor or walls, apply quarter-round molding with finishing nails.

Install faucet

Assemble the faucet and the drain on the new sink before installing it on the vanity. Place the gasket on the faucet. While supporting the faucet from underneath, screw on fastening nuts. Insert the faucet into the designated holes on the top of the vanity. Attach the faucet to the water supply lines with an adjustable wrench.

Secure the vanity top

Apply silicone caulk on the top of the cabinets and place the top of the vanity, center and position correctly. Firmly press down. Ensure that the countertop is level and flush to the wall.

Reconnect the water supply

Attach the water lines to the faucet supply lines and reconnect the P trap. Turn on the faucet and check for any leaks. Install the pop-up drain on your sink.
There you have it! Your bathroom vanity is installed. DIY projects are like dominoes, so you’ll probably be onto the next one before long … and the next one!