How long does it take to install bathroom vanity?

This task typically takes 3-4 hours to complete, depending on your experience level and the specific conditions of your bathroom plumbing system.

What tools do I need to install bathroom vanity?

You'll need the following tools: Drill, Level, Stud finder, Adjustable wrench. Make sure all tools are in good condition before starting.

Is this task suitable for beginners?

This task is rated as Moderate difficulty. This task requires some plumbing experience and intermediate DIY skills.

All guides

BathroomIntermediate

Install Bathroom Vanity

Time

180–240 min

Steps

Pre-check

4 items

Skill

Intermediate

Scope

Install a bathroom vanity: set and level the cabinet, secure it to wall studs, mount the countertop and sink, connect the faucet and P-trap, and test for leaks.

Safety

Read before starting

Turn off water supply before disconnecting plumbing. Use proper lifting or a helper for heavy cabinets and countertops. Ensure GFCI protection for nearby outlets; avoid drilling into wiring or plumbing in wall.

Pre-Check

4 items · complete before you start

New vanity fits space; rough-in (drain, supply) matches or can be adapted
Required
Water supply shut off; shutoff valves accessible or new valves on hand
Required
Stud finder and level available; wall and floor condition suitable for mounting
Required
Countertop and sink (integral or separate) and faucet on hand
Required

0 / 25 complete

Remove Old Vanity (if applicable)

Turn off water at shutoffs; disconnect supply lines and P-trap; have bucket and towels ready
Remove countertop (may be caulked to wall — cut seal with utility knife)
Unscrew cabinet from wall studs; remove vanity; plug drain opening to limit sewer gas
Take photos of plumbing layout; save usable shutoff valves

Position and Level New Vanity

Set vanity in place against wall; align with drain and supply lines
Check level side-to-side and front-to-back; slide shims under base as needed
Mark stud locations on wall through back rail; ensure mounting screws will hit studs

Secure Cabinet to Wall

Drill pilot holes into studs through back rail or hanging bracket
Drive screws (e.g. 2½–3 in) into studs; do not rely on drywall alone
Recheck level after securing; add or adjust shims; trim shims flush if needed

Install Countertop and Sink

Set countertop on cabinet; secure per manufacturer (clips, adhesive, or screws from below)
Apply bead of silicone where countertop meets wall if specified
Install sink: drop-in use putty or gasket under rim; undermount per kit instructions
Connect faucet to sink; install drain assembly and pop-up linkage; leave supply and trap for next step

Connect Plumbing

Connect supply lines from shutoffs to faucet tailpieces; hand-tight + ¼ turn
Install P-trap from sink tailpiece to wall drain; use slip nuts and washers; align without stressing pipes
Hand-tighten trap nuts; avoid over-tightening plastic
Turn water on slowly; check all connections and faucet base for leaks

Test and Finish

Run hot and cold water; test drain and pop-up
Caulk along backsplash and base per preference; clean squeeze-out
Reinstall doors/drawers; adjust hinges or slides as needed