Guides · Design & planning
Bathroom vanity sizing guide
Most vanities come in standard widths of 24, 30, 36, 48, 60 and 72 inches, around 18 to 21 inches deep and about 32 to 36 inches tall. The right size is whatever leaves comfortable clearance to the toilet, door and walkway, not the biggest box that fits the wall.
Standard vanity widths and what they suit
Stock and semi-custom vanities are built in a fairly consistent set of widths. Custom cabinets can be any size, but starting from these makes it easier to find matching tops, sinks and mirrors.
| Width | Typical sinks | Usually suits |
|---|---|---|
| 18–24 in | One small sink | Powder rooms, very tight hall baths |
| 30 in | One sink | Compact hall or kids' baths |
| 36 in | One sink with some counter | Most standard hall and guest baths |
| 42–48 in | One sink with good counter, or two very small sinks | Larger hall baths, smaller primary baths |
| 60 in | One or two sinks | Primary baths; two sinks is workable but counter is tight |
| 72 in and up | Two sinks with counter between | Primary baths with room to spare |
A double vanity starts to feel genuinely usable at around 60 inches, and comfortable at 72 inches or more. Below that, two sinks often means two people bumping elbows with nowhere to set anything down. Many couples are happier with one sink and a long run of counter.
Depth
The common depth for a bathroom vanity is about 21 inches. Shallower cabinets, around 18 inches or less, exist for narrow rooms where the vanity would otherwise crowd the walkway or the door swing. Deeper cabinets, 22 inches and more, give more counter behind the sink and are easier to fit in larger primary baths.
A shallow vanity sounds like a small change, but in a tight bathroom three inches back can be the difference between a door that clears and one that catches.
Height: standard vs comfort height
- About 30–32 in
- The older standard. Still common in kids' baths and some vintage-style pieces. Many adults find it low.
- About 34–36 in
- "Comfort height," close to kitchen counter height. The default in most new primary and hall baths.
- Vessel sinks
- The bowl sits on top of the counter, so the cabinet is usually lower to keep the rim at a comfortable height.
- Wall-mounted / floating
- Can be hung at whatever height suits the household, and leaves the floor open underneath.
If the vanity is part of an aging-in-place design, knee clearance under the sink and the height of the counter need planning around the person using it.
Clearances that decide the size
Buying the vanity to fill the wall is the most common sizing mistake. What matters is the space left around it. These are widely used planning guidelines; your local building code sets the actual minimums, and a designer or contractor should confirm what applies.
Toilet to vanity
Planning guidelines usually call for at least 15 inches from the centre of the toilet to the side of the vanity, and more feels better. Many designers aim for 18 inches or so where room allows.
In front of the vanity
Leave roughly 30 inches or more of clear floor in front so you can stand at the sink and open drawers comfortably.
Door swing
Check that the entry door and the vanity doors or drawers don't collide. Pocket or outward-swinging doors can free up a surprising amount of room.
Between two sinks
On a double vanity, 30 inches or more between sink centres gives each person their own zone.
Sink to side wall
Keep some space between the sink centre and a side wall or tall cabinet so you aren't washing your face against the wall.
Shower or tub edge
A vanity right up against a shower opening can make the entry feel pinched and gets splashed. Allow room for the glass door to swing, if there is one.
How to measure your space
- Measure the full wall width where the vanity will sit, at counter height and at floor level (walls aren't always straight).
- Mark the toilet centreline and measure from it to where the vanity side would land.
- Measure from the wall to the opposite obstruction: the tub, shower, toilet front or door.
- Note the door swing and any drawers or cabinet doors that open into the room.
- Locate the existing supply lines and drain. Keeping the sink over them avoids plumbing work; moving them is possible but changes the scope.
- Check for outlets, switches, windows and the mirror or medicine cabinet above.
Storage vs size
A bigger vanity doesn't automatically mean better storage. The space around the sink trap is awkward, and a cabinet full of doors with one shelf wastes a lot of it. Before going wider, look at:
- Drawer stacks, including U-shaped drawers that wrap around the plumbing
- A tall linen tower beside a smaller vanity
- A recessed medicine cabinet, which adds storage without taking floor space
- Floating vanities with an open shelf below for towels and baskets
In a small room, a slightly narrower vanity plus a recessed cabinet often works better than the widest vanity the wall will take. There's more on this in our small bathroom remodel ideas.
Florida-specific points
In a humid climate, what the cabinet is made of matters as much as its size. Look for plywood or moisture-resistant boxes over basic particleboard, good edge sealing, and finishes rated for bathrooms. Floating vanities make it easier to clean underneath and let air circulate. Hard water is hard on faucets and the counter around them; a quartz or solid-surface top with an undermount sink is easier to keep free of mineral rings than a surface with lots of seams.
Mirrors and lighting follow the vanity
Once the vanity width is set, the mirror is usually a little narrower than the vanity, or one mirror per sink on a double. Sconces on either side of the mirror give more even light on the face than a single fixture overhead. Plan the electrical boxes after the vanity and mirror sizes are fixed, not before.
If you're choosing between sizes or thinking about moving the sink, our bathroom vanity installation service covers measuring, cabinet options and the plumbing side, and we can talk it through with you on site.
Book a consultation
Start with a conversation about your bathroom
Call and tell us what isn’t working and what you’d like instead. We’ll talk through scope and materials, arrange a visit, then put it in writing.
- Which bathroom, and roughly how old it is
- What bothers you now: leaks, dated tile, a tub you don’t use
- Any photos or ideas you’ve saved
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