How To Replace A Bathroom Vanity

How To Replace A Bathroom Vanity

Replacing a bathroom vanity can update the look of your bathroom and increase functionality. When done properly, installing a new vanity is a manageable project for a committed DIYer. In this guide, we will walk through the step-by-step process to remove your old vanity and install a new one. We have divided the project into three main phases: preparation, vanity removal, and vanity installation. Within each phase, we explain the sequence of tasks using bullets and tables when applicable. By following our instructions, you can efficiently replace your bathroom vanity.


Turning off Water Supply and Electricity

  • Locate water shut-off valves behind sink or under vanity and turn clockwise to shut off hot and cold water lines so they don’t leak when you disconnect them
  • Shut off power going to the bathroom at the circuit breaker to avoid getting shocked while removing vanity Emptying Vanity and Covering Floor
  • Remove everything from within the vanity and under the sink
  • Lay drop cloths on floor around workspace to protect from dust and debris

Materials Needed

Here are the materials needed for replacing a bathroom vanity:

  • New preassembled vanity
  • Wrenches
  • Channel lock pliers
  • Bucket
  • Flashlight
  • Teflon tape
  • Screwdrivers

Vanity Removal

With the prep work complete, we can move on to removing the old vanity. This involves disconnecting and removing the plumbing, electrical, wall attachments, and sink. Refer to the bullet points below for the sequence of tasks:

  • Disconnect drain pipes under sink
  • Detach water supply lines from faucet handles and shut off valves
  • Disconnect drain pipes from wall or floor
  • Remove any caulking or sealant around edges of vanity
  • Take out existing screws, nails, or brackets attaching vanity to wall
  • Carefully slide out old sink and vanity

Now the fun part – installing your lovely new vanity!

Vanity Installation

Installing your fresh vanity requires carefully fastening it to the wall, re-connecting the plumbing and electrical, caulking around the edges, and finally testing for leaks before finishing up.

Securing Vanity Cabinet to Walls

  • Place preassembled vanity cabinet in desired position
  • Level and shim cabinet to ensure it sits evenly
  • Attach mounting rail or ledger board to wall studs if needed
  • Drill pilot holes and use screws to anchor vanity to wall studs

Connecting Plumbing and Electrical

  • Attach hot and cold water supply lines to shut off valves and faucet connections
  • Connect drain assembly pipes, using bucket to catch water
  • Leak-check all connections before moving forward
  • Connect electrical for hardwired lights or outlets if existing

Applying Caulk and Conducting Leak Checks

  • Run a bead of bathroom caulk around vanity top and walls to seal any gaps
  • Turn water supply back on and check for leaks at all water connections
  • Verify drain pipes do not leak
  • Turn power back on to test electrical functioning

Finishing Touches

  • Add any finishing touches like adjusting doors or drawers
  • Clean up vanity top and surround
  • Remove floor protection and cleanup dust or debris
  • Store supplies and tools

With that, your vanity replacement project is complete! We hope this guide with helpful bullet lists and tables made the process smoother. Reach out in the comments if you have any other questions. Happy upgrading!


Replacing a bathroom vanity significantly updates the look of your space. While the project takes some work, our detailed walkthrough breaks down the process into achievable steps. First, prepare by turning off water and power and laying down floor protection. Next is vanity removal – disconnect plumbing and electrical, detach from the wall, and slide out the old sink. Installing the fresh vanity is next by securing it to the wall, reconnecting supplies, caulking, and leak testing. Lastly add the finishing touches. Refer to the instructions above if you get stuck on any step.

With our tips and checklist format, you can install a new vanity with confidence. Here’s to stylish sinks and more functional storage! Contact Pinnacle Building Group for help on your bathroom vanity!

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