Bathroom vanity installation cost

Installing a bathroom vanity costs $400 to $2,500 including the unit, typically around $1,100. Labor alone is $200 to $700. The cost is driven by whether the plumbing lines up with the new unit and whether the countertop comes with it.

What it costs

The measurement that decides everything

The waste pipe comes out of the wall or the floor at a fixed point. A new vanity either has room for it or it does not.

Wall-mounted waste is the common case and the flexible one: most vanities have an open back or a removable panel, and the trap can be shifted a few inches within the cabinet.

Floor waste limits you far more, because the pipe comes up inside the cabinet footprint and the vanity's base and drawers have to clear it. Full-depth drawers usually cannot.

A floating vanity needs blocking inside the wall to carry the weight, which means opening the drywall unless the wall is already open. If the vanity is going in during a remodel, say so early; retrofitting blocking afterwards costs $200 to $800.

Measure before you buy: the width available, the depth to the door swing, the height of the waste outlet, and whether the door will still open with the vanity in place. That last one catches people in small bathrooms constantly.

Height, depth and the details people notice later

Height. Standard vanities are 32 inches to the top; comfort height is 36, the same as a kitchen counter. Comfort height suits adults and is worse for small children.

Depth. Standard is 21 inches. In a narrow bathroom, an 18 inch shallow vanity is the difference between passable and cramped.

Drawers or doors. Drawers are far more useful and cost more, because of the slides and the notching around the waste pipe. A vanity with one central drawer and doors below is the common compromise.

Countertop and sink. Integrated tops in cultured marble are cheap, seamless and look it. A separate stone top with an undermount basin is the upgrade people actually notice.

Soft-close hardware. Cheap on a new unit, impossible to add convincingly later.

Frequently asked questions

Can I install a vanity myself?

A like-for-like swap on wall-mounted plumbing is a realistic weekend job. Test the shut-off valves first: if they will not close, you are doing a bigger job than you planned with the old vanity already out. A floating vanity or one needing plumbing moved is not DIY.

Do I need to move the plumbing for a double vanity?

Almost always. A single waste becomes two, which means a new tee and usually a new vent arrangement. Budget $400 to $1,500 and check that the wall has room, because two traps and two supply pairs in a stud bay is tight.

What size vanity fits my bathroom?

Leave at least 30 inches of clear floor in front, and check the door swing. In a bathroom under 40 square feet, a 24 to 30 inch vanity is usually the honest maximum even when a 36 will physically fit.

Is a floating vanity worth the extra?

It makes a small bathroom look larger because the floor runs underneath, and it makes cleaning easier. It costs more, needs blocking, and limits storage height. In a small bathroom it is often worth it; in a large one it is a style choice.

Should I replace the mirror and lights at the same time?

If the vanity width is changing, yes, because a mirror sized for the old unit will look wrong. Doing it in one visit is cheaper than two, and the wall is already going to need patching.