How to Install a Wall-Mounted Bathroom Vanity

Installing a wall-hung vanity gives a clean, modern look and opens up floor space, but it requires careful preparation and sturdy wall blocking. This blog walks through the process from wall reinforcement to the final finishing touches.

Step 1: Add Wall Blocking for Support

Before mounting the vanity, install a solid piece of structural timber behind the wall. This creates a strong anchor point for the vanity screws and ensures it can carry the load once the sink and countertop are installed.

• Choose a hardwood or structural-grade timber for durability.

• Secure it between existing wall studs at the height where the vanity will be mounted.

• Mark both the center of the wall and the center of the vanity for alignment later.

Step 2: Mark and Drill for Plumbing

Use a laser level to mark the height of your blocking and the centerline of your plumbing. The laser helps align the vanity’s drain hole with the wall pipe accurately.

• Mark the height line and centerline directly on the back of the vanity.

• Use a hole saw to drill for the waste pipe. Go slow, especially through hardwood, to avoid kickback or tool damage.

• If the timber is thick, drill halfway through from the front, then finish the hole from the back to get a clean cut.

Step 3: Drill Through Wall Tiles

Drilling through wall tiles can be tricky. Use a tile or masonry bit and keep your drill speed low.

• Start with light pressure to prevent the bit from slipping.

• Use masking tape over the drill point for extra grip.

• Once you’re through the tile surface, increase speed slightly to complete the hole.

Step 4: Mount the Vanity Securely

With all holes ready, lift the vanity into position and align it with the center marks. Use batten screws or heavy-duty lag screws to fix it to the blocking behind the wall.

• Double-check that it’s level before tightening all screws.

• Use multiple fasteners — 8 to 10 large screws are typical for solid support.

• Leave a small gap between the vanity and wall tiles to avoid stress cracking.

Step 5: Cut the Countertop for the Basin

When cutting the vanity top for the sink:

• Trace the sink outline using the template provided.

• Use a jigsaw for the cutout, moving slowly to avoid chipping.

• Sand the edges smooth and seal them with a waterproof finish to protect from moisture.

Step 6: Adjust Drawers Around Plumbing

After the basin and drain are installed, drawers may need trimming to clear the waste pipe.

• Cut out a section from the back or bottom of the top drawer where the pipe passes.

• Seal the cut surfaces to prevent swelling from humidity.

• Reassemble the drawer using glue or brad nails to keep it strong and functional.

Step 7: Fill Gaps and Finish Trim

Underneath medicine cabinets or above the vanity, small gaps are common. Fill them with custom timber strips for a seamless look.

• Cut a thin piece of wood to fit the gap.

• Nail it into place and apply silicone sealant along the joint for a clean finish.

• Maintain a slight recess at the handle edge for finger access if the design is handleless.

Final Check

Inspect your work for:

• Secure wall anchoring

• Smooth drawer operation

• Level installation

• Sealed joints and edges

Once complete, you’ll have a sturdy, professional-looking vanity that’s built to last — with no visible gaps or exposed hardware.