Bathroom Vanity Plumbing Installation Cost
The bathroom vanity plumbing installation cost for a standard replacement in 2026 runs $300 to $1,500 for labor and basic parts, with most straightforward installs landing between $400 and $800. The wide range reflects the vanity type: a basic single-sink vanity on existing hookups is quick work, while a wall-mounted or double vanity, a relocated drain, or a vessel sink adds hours and parts. The vanity unit itself is usually priced separately and can run from $200 for a basic cabinet to $2,000 or more for a furniture-style double vanity.
Average Bathroom Vanity Installation Cost in 2026
For a like-for-like replacement — old vanity out, new vanity in, same drain and supply locations — a plumber typically needs 2 to 4 hours. At 2026 labor rates of $75 to $150 per hour, that puts labor at $200 to $600, plus $50 to $200 in parts such as supply lines, a P-trap, shut-off valves, and sealant. That is why the common all-in range for the plumbing portion is $300 to $800.
Costs climb when the job grows beyond a swap. Installing a vanity as part of a remodel, where the plumber also runs new supply lines and a new drain, runs $800 to $1,500. A double vanity with two sinks, two faucets, and two drains runs $700 to $1,800 in plumbing labor and parts. And a vanity relocation — moving the sink to a different wall — is a drain move, which we cover in detail in our guide to the cost to move plumbing in a bathroom. For the full remodel picture, see bathroom plumbing remodel cost.
Vanity Installation Cost by Vanity Type
| Vanity type | Plumbing labor + parts | Notes |
|---|---|---|
| Standard single-sink (floor-standing) | $300–$800 | Most common; fastest install |
| Double vanity | $700–$1,800 | Two drains, two faucets, longer hookup time |
| Wall-mounted / floating vanity | $600–$1,400 | Drain and supplies often rerouted inside the wall |
| Vessel sink vanity | $500–$1,200 | Taller drain assembly, precise height setting |
| Pedestal sink replacement | $300–$700 | Simple, but wall repair often needed |
| Vanity with new drain location | $800–$2,000 | Includes drain reroute and venting check |
Wall-mounted vanities deserve a special note. They look clean and make a small bathroom feel larger, but the drain and supply lines must be positioned precisely inside the wall, and the wall itself needs blocking — solid wood framing behind the drywall — to carry the vanity's weight. If the blocking is not already there, opening the wall to add it adds $200 to $500. Measure twice: once a floating vanity is mounted, adjusting its height means patching the wall.
What the Plumbing Work Involves
A vanity installation follows a predictable sequence. First, the plumber shuts off the water, disconnects the old supply lines and drain, and removes the old vanity. Then the new vanity is set in place, leveled, and secured to the wall studs. Next comes the hookup: new supply lines from the shut-off valves to the faucet, a new P-trap connecting the drain tailpiece to the wall drain, and a test of every joint for leaks. Finally, the plumber seals the sink to the countertop or the vanity top to the wall, caulks where needed, and checks drainage speed and faucet function.
Good installers also replace aging parts while they are there. Angle-stop shut-off valves that are 15 or more years old often seize or leak when disturbed, and replacing them during the install costs $50 to $150 per valve versus a separate service call later. The same applies to corroded supply lines and a P-trap that has seen better days. Ask your plumber to quote these as line items so there are no surprises, and if the old faucet is being reused, expect a separate charge for bathroom faucet installation cost if it needs replacing too.
Moving the Vanity to a New Location
Moving a vanity sink within the same wall — a foot or two to center it under a new mirror — is usually a $300 to $900 job, since the drain and supplies can often be extended or shortened without major surgery. Moving it to a different wall is a different story: the drain must be rerouted at the correct slope, the vent may need to move, and the floor or wall must be opened. That typically costs $800 to $2,000 depending on access below and whether the home sits on a slab.
One practical tip: if you are moving the vanity, decide the exact sink centerline before the plumber starts, because the drain stub-out position is set early and is expensive to change later. Bring the vanity's specification sheet to the job — it shows the drain height and setback the manufacturer expects, and a good plumber will rough the drain to match rather than forcing the vanity to fit an existing stub-out.
Faucet and Drain Options That Affect Cost
Faucet configuration changes the hookup time. A single-hole faucet is the fastest install; a widespread faucet with separate hot, cold, and spout pieces takes longer and needs three holes drilled or present in the countertop. Wall-mounted faucets, popular with vessel sinks, require the supply lines to be roughed into the wall at an exact height — a job best done before the tile goes up, not after. Budget an extra $150 to $400 for a wall-mounted faucet rough-in versus a standard deck-mounted faucet.
Drain choices matter too. A standard pop-up drain is included in most faucet sets and installs quickly. A grid drain (common with vessel sinks that lack an overflow) and a push-button drain are similarly straightforward, but a decorative bottle trap — the exposed chrome trap used with floating vanities — costs $80 to $200 for the part alone and must be aligned precisely to look right. If your vanity has no overflow, confirm the drain type matches, or the sink will drain slowly and gurgle.
Materials and Extra Parts to Budget For
Beyond labor, budget $50 to $300 for parts on a standard install, and more for premium finishes. Typical items include braided stainless supply lines ($10–$25 each), quarter-turn angle-stop valves ($15–$40 each), a P-trap kit ($15–$60, more for decorative chrome), plumber's putty or silicone sealant, and mounting hardware. If the existing shut-offs are old gate valves, replacing them with quarter-turn ball valves is a worthwhile upgrade that most plumbers recommend during a vanity install.
The vanity top and sink are usually the homeowner's purchase and are not included in the plumbing quote. A cultured marble or quartz top with an integrated sink simplifies the install, since there is no separate sink to mount and seal. An undermount sink requires the countertop fabricator's cutout to match the sink exactly, and the plumber mounts the sink to the underside of the top — coordinate the fabricator and the plumber so the sink arrives before the top is templated, or the schedule slips.
DIY vs. Hiring a Plumber
A like-for-like vanity swap is one of the more accessible DIY plumbing jobs, and a confident homeowner with basic tools can often complete it in half a day. The risks are real, though: overtightened supply connections crack fittings, a misaligned P-trap leaks slowly inside the cabinet, and an unlevel vanity stresses the drain joint until it fails. A slow leak inside a vanity cabinet can rot the cabinet floor and subfloor before anyone notices, turning a $500 DIY saving into a $2,000 repair.
Hire a plumber when the drain location changes, the shut-off valves are seized or corroded, the home has old galvanized or polybutylene supply lines, or the vanity is wall-mounted and needs in-wall work. A professional install also comes with a workmanship warranty — typically one year — which covers leaks at the connections. If you do go the DIY route, buy new supply lines and a new P-trap rather than reusing the old ones, and check every joint with dry tissue after running the faucet for several minutes.
How to Get a Fair Quote
Ask for a written quote that answers four questions: is the vanity, faucet, and top included or owner-supplied; are new shut-off valves and supply lines included; is haul-away of the old vanity included; and what happens if the drain stub-out does not match the new vanity? Reputable plumbers answer all four without hesitation. Also confirm whether the quote covers leveling and securing the vanity — some plumbers hook up plumbing only and leave cabinet setting to the remodeler, which can lead to finger-pointing if the vanity is not level.
- Get two or three quotes for anything beyond a simple swap, and compare line items, not just totals.
- Schedule the plumber after the vanity arrives. Dimensions on a website do not always match the unit in the box.
- Keep the old vanity until the new one is tested. If the new unit is damaged or the wrong size, you still have a working sink.
- Photograph the existing hookups before demolition, so the plumber can see valve positions and drain height.
A vanity install is a small job with an outsized effect on how the bathroom feels every morning. Spend the money on solid hookups and new valves, and the vanity will serve quietly for decades. For related numbers, see our guides to bathroom faucet installation cost and bathroom drain cleaning cost, or browse the full bathroom plumbing hub.
Need a vanity installed? Call (877) 762-1902 for a free plumbing consultation.