The best floating vanity for a small bathroom is 18 to 30 inches wide, 16 to 20 inches deep, and hung so the counter sits 32 to 36 inches off the floor. Sink-included wall mounted models start at about $830 with the Rina 24. Below I go through the sizes, the mounting height, the blocking the wall needs, and where the plumbing has to come out.
A customer sent me a drawing of a hall bath with a 60 inch wall that the toilet and the sink have to share. She wanted a 36 inch vanity because that's what every photo she'd saved showed, which I understand, nobody photographs a 24. I drew it in, and on paper the toilet would have had 9 inches of elbow room. Code wants 15, and so does anyone who has to sit there.
Small bathrooms fail on clearances, not on style. A vanity that's 6 inches too wide can't be fixed by picking a shallower cabinet, though people try, and a floating cabinet hung at the wrong height makes a 24 inch vanity feel like a shelf somebody stuck on the wall. The photos never show the toilet. I've looked.
The right floating vanity for a small bathroom is 18 to 30 inches wide, 16 to 20 inches deep, and hung so the counter sits 32 to 36 inches off the floor. Here's how to pick the width from the wall, and the height from the people who are going to stand at it.
Why a floating vanity works in a small bathroom
A floating vanity hangs on the wall with nothing under it, so the floor runs straight through from wall to wall. In a bathroom under 40 square feet that strip of visible floor is the single biggest reason the room looks larger. It also makes mopping easy, keeps the cabinet out of standing water when the shower curtain loses, and lets you set the counter height wherever you want it.
The depth is the other thing. Because the cabinet doesn't need a toe kick or a base frame, floating models run shallower than freestanding ones. Look for a depth of 19 inches or less on the product page if the room is tight. The Lek 18 inch is only 10 inches deep, which I had to double check the first time I read the spec sheet.
The cost is the wall. A floating vanity needs blocking between the studs and plumbing that comes out of the wall rather than up through the floor. Both are easy in a remodel and a lot harder in a quick swap. If your plumbing comes up through the floor and you don't want to open the wall, read the small bathroom vanity ideas guide for narrow freestanding options.
Sizes: 18, 24, and 30 inches
Floating vanities for small bathrooms come in three practical widths. An 18 to 20 inch vanity fits a wall under 30 inches. A 24 inch vanity is the standard small-bath size and fits walls of 36 to 40 inches. A 30 inch vanity needs 42 inches of wall and gives you counter space on both sides of the sink.
18 to 20 inches. This is powder room territory. The Lek 18 inch wall mounted vanity has a ceramic integrated sink, a 10 inch depth, and lists at $850. At this width there's no counter space, just the basin, so plan a shelf or a medicine cabinet, because the soap and the toothbrushes have to go somewhere.
24 inches. This is the most common small-bath size, so filter the floating vanity collection by width to see the full range. The Rina 24 is 22 inches deep with a porcelain integrated top at $830. The Victoria 24 is 20 inches deep with two full drawers at $1,300, and the Colmar 24 is 19 inches deep at $1,220.
30 inches. Twenty-one wall mounted models sit in the 30 to 35 inch range. The Victoria 30 adds 6 inches of counter to the 24 at $1,500, the EDI 30 stays 19 inches deep at $1,290, and the Barcelona 30 pairs a sintered stone top with an undermount sink from $1,350. Thirty inches is the width where an undermount sink and real counter space both fit.
Before you settle on a width, check the two clearances plumbing code requires: 15 inches from the sink centerline to any side wall and 21 inches of clear floor in front of the vanity. A 24 inch vanity centered on a 36 inch wall meets the first one with 6 inches to spare, which is the kind of margin I like to see.
How high to hang it
Hang a floating vanity so the finished counter sits 32 to 36 inches above the floor. Most adults are comfortable at 34 to 36 inches, which matches a kitchen counter. Use 34 inches as the maximum if the bathroom must meet ADA, and drop to 30 to 32 inches for a children's bathroom or a vessel sink.
The sink type changes the math. With an integrated or undermount sink, the counter is the working height, so measure to the top of the counter. With a vessel sink that sits on the counter, the rim lands 5 to 6 inches higher, so hang the cabinet lower to put the rim at 34 to 36 inches.
Mark the mounting rail height from the counter height, not the other way around. Take the target counter height, subtract the cabinet height and the top thickness from the spec sheet, and that's where the rail goes. Write the number on the wall in pencil before the plumber shows up, because the drain height depends on it and he'll ask.
Storage: drawers, cutouts, and shelves
A floating vanity with two full-depth drawers holds more than a freestanding vanity of the same width with doors. The top drawer needs a U-shaped cutout to pass around the P-trap, and the best compact models have one. Add an open shelf below or a matching linen tower beside it when the wall allows.
Look at the drawer construction on the product page, and if it isn't there, ask, because this is the thing that decides whether the drawer is any use. Soft-close drawers with a cutout run the full 18 to 20 inch depth. Drawers without a cutout either stop short of the trap or are shallow, which cuts the usable storage about in half. The Victoria, Louis, and EDI lines all use the cutout design.
Two more places to find storage. A recessed medicine cabinet above the vanity adds a shelf for every bottle you don't want on the counter. A 12 to 15 inch linen cabinet on the same wall, hung at the same height, keeps the floating line and holds towels. The vanity storage guide covers organizers and open shelf layouts in detail.
Finishes and looks that suit small rooms
Light wood, matte white, and soft grey are the finishes that make a small bathroom read larger, and a white integrated sink top ties any of them together. Matte black hardware on warm oak gives you some contrast without making the cabinet feel heavy. Fluted drawer fronts add texture at 24 inches without looking busy, though I'd skip them if the tile already has a lot going on.
Think about the mirror at the same time, not after. A round or pill-shaped mirror over a 24 inch vanity softens the box shape of the cabinet, and a mirror that runs the full vanity width over a 30 inch model doubles the light. Wall sconces on either side of the mirror beat a single bar light in a narrow room.
Every finish in this post is in the floating vanity collection.
Floating or freestanding for a small bathroom
Go floating when you can add blocking and bring the plumbing through the wall, and when the floor is finished under where the vanity goes, because you'll see it. Go freestanding when the plumbing comes up through the floor, the wall is masonry or plaster, or the install has to happen this afternoon without opening anything.
The floating vanity wins on cleaning, visible floor, and adjustable height. The freestanding vanity wins on install speed and on hiding a floor that was tiled around the old cabinet. The freestanding collection includes narrow 20 inch models that fit the same walls as the floating picks above.
The floating vs freestanding guide walks through the full comparison, and the freestanding vanity collection has the compact models.
For contractors and designers
A floating vanity install comes down to three numbers from the cut sheet: the rail height, the drain stub height, and the clear zone behind the drawers. Set blocking before drywall, rough the drain into the open area of the cabinet, and keep the counter at 34 inches or below for an accessible bath. The rest is standard fixture clearance.
Blocking. Install a 2 by 8, or two 2 by 6 boards flat, between the studs and centered on the rail height. Run it the full width of the cabinet plus one stud bay on each side so the rail can land on wood anywhere. For a retrofit, cut the drywall from 28 to 40 inches above the floor, add the blocking, and patch. Fasten the rail with 5/16 inch lag screws or structural screws into the blocking, never with toggle bolts alone.
Plumbing height. With the counter at 34 inches and a typical 18 to 20 inch tall cabinet, the cabinet bottom sits around 14 to 16 inches off the floor. The drain stub usually lands 18 to 22 inches off the floor inside the open area behind the drawers, and the supply stops a few inches above it and to either side. Pull the exact dimensions from the model's spec sheet before rough-in, and keep the trap arm inside the cabinet's open zone, not behind a drawer box. The plumbing misalignment guide covers offset traps when the stubs are already in the wall.
Clearances. IPC 405.3.1 sets 15 inches from the sink centerline to any side wall or obstruction, 30 inches between adjacent sink centerlines, and 21 inches of clear floor in front. Measure the centerline from the basin, not the cabinet, on models with an offset sink.
ADA and commercial. Under the ADA Standards section 606, an accessible lavatory has its rim or counter at 34 inches maximum, 27 inches of knee clearance at the front edge, a 30 by 48 inch clear floor space, and exposed pipes insulated or shielded. A floating vanity with an open underside meets the knee and floor space rules by default. For client-facing restrooms add lever or sensor faucets and favor solid surface or porcelain integrated tops with no seam to clean.
The 60 inch wall got a 30 inch floating vanity, hung with the counter at 34 inches. The toilet got its 15 inches, the floor shows under the cabinet, and the room reads bigger than it would have with the 36, which she didn't believe until it was hung and she stood in the doorway.
Free download: the Bathroom Vanity Measuring Worksheet
Four page PDF with the room and plumbing measurements that decide whether a vanity fits, plus a free fit check from KBF when you send us your numbers.
Frequently asked questions
What is the best floating vanity for a small bathroom?
For most small bathrooms the best floating vanity is a 24 inch model, 18 to 20 inches deep, with an integrated sink and two soft-close drawers. The Rina 24 at $830 and the Victoria 24 at $1,300 are the two KBF sells most often for that job. Step down to the 18 inch Lek if the wall is under 30 inches.
How high should a floating vanity be mounted?
Hang a floating vanity so the finished counter sits 32 to 36 inches off the floor. Use 34 inches if anyone in the house uses a wheelchair, since that is the ADA maximum, and go to 36 inches for tall adults. Subtract the sink height first if the model uses a vessel sink.
Do floating vanities need blocking in the wall?
Yes. A floating vanity hangs on a rail or cleat that must be screwed into solid wood, not drywall. Add a 2 by 8 or two 2 by 6 boards flat between the studs at the rail height before the wall is closed, or open the wall and add them in a retrofit.
How much weight can a floating vanity hold?
Properly blocked and mounted with lag screws, a floating vanity will carry the cabinet, a filled sink, stored items, and an adult leaning on the counter. The limit comes from the wall, not the cabinet, which is why blocking into studs matters more than the brand of anchor.
What size floating vanity fits a small bathroom?
An 18 to 30 inch wide floating vanity fits a small bathroom. Choose 18 to 20 inches for a wall under 30 inches, 24 inches for walls of 36 to 40 inches, and 30 inches when there is 42 inches or more. Keep depth at 16 to 20 inches so the walkway stays clear.
Where does the plumbing go for a floating vanity?
The drain and both supply lines come out of the wall behind the cabinet, not up through the floor. The drain stub usually sits 18 to 22 inches off the floor for a vanity hung at 34 inches, but the exact height depends on the model, so check the spec sheet before the plumber roughs in.
Want a second set of eyes on your wall measurement or rough-in heights? Call 657-279-8130 or visit the KBF showroom in Anaheim, CA. We ship to the lower 48 states.
