Most vanity fit problems start the same way: the cabinet gets chosen before the space gets measured. On a product page, vanity sizes look like a single width number, but the dimensions that decide whether a unit actually works in your bathroom are depth, height, clearance and plumbing position. This guide covers the standard size ranges, how to measure properly, and the fit mistakes we see most often from buyers across Canada, whether you are outfitting a tight condo powder room in Vancouver or a century-home bathroom in Halifax.
Standard vanity sizes at a glance
Vanities in Canada are still sold primarily in imperial widths, even though most spec sheets list millimetres alongside. Common single-sink widths run from 24 to 48 inches, while 60 and 72 inch units are usually configured as doubles. European lines often land between the standard steps, so never assume a nominal width is exact until you have read the dimensioned drawing.
| Nominal width | Metric equivalent | Typical use |
|---|---|---|
| 24 in | about 610 mm | Powder rooms and small baths |
| 30 to 36 in | about 760 to 915 mm | Standard single-sink bathrooms |
| 48 in | about 1220 mm | Large single, or a compact double |
| 60 to 72 in | about 1525 to 1830 mm | Double-sink primary baths |
Depth is the quieter number, and it causes more surprises than width. A full-depth vanity typically measures about 20 to 22 inches front to back including the countertop, while shallow models in the 16 to 18 inch range exist specifically for the narrow bathrooms common in older Canadian housing stock. Height splits into two camps: traditional vanities sit around 30 to 32 inches, while comfort-height models run closer to 34 to 36 inches, similar to a kitchen counter. If you plan to top the cabinet with one of the vessel sinks now popular in powder rooms, remember the basin adds several inches, which is why vessel-ready vanities are deliberately lower.
Measure the space, not the old vanity
Replacing like for like sounds safe, but the old unit may never have fit well in the first place. Measure the room instead:
- Width at three heights. Measure wall to wall at the floor, at counter height and near the mirror line. Older homes in Quebec and the Maritimes are rarely plumb, and the narrowest measurement governs.
- Note everything that sticks out. Baseboards, window trim, radiators, heat registers and door casings all steal usable width and depth. A cabinet that clears the wall can still collide with trim.
- Locate the plumbing. Mark where the drain and supply lines enter, measured from the side wall and the floor. Off-centre rough-ins are common, and they decide whether the sink can sit where you want it without opening the wall.
- Check the swing paths. Open the bathroom door and any shower door fully. Both need to clear the new cabinet, hardware included.
- Measure the route in. For 60 and 72 inch pieces, confirm the vanity can make it through hallways, stair turns and, in condo buildings, the elevator. More than one double vanity has gone back on the truck because of a staircase.
Clearance rules, stated generally
Exact minimum clearances come from the National Plumbing Code and provincial building codes as adopted and amended locally, so confirm specifics with your municipality or contractor before you commit. As general design guidance, though, the following keeps a bathroom usable:
- Leave a genuine clear walkway in front of the vanity. Design guides commonly suggest at least 21 inches of clear floor, and 30 inches feels far better in daily use.
- Keep sensible side clearance to the toilet. Crowding a vanity against the bowl makes both fixtures worse to use and to clean.
- Plan for drawers and doors at full extension, not just the closed cabinet. A deep drawer can project well over a foot into the room.
- Where floor space is tight or seated access matters, wall-mount vanities earn their keep. Keeping the floor visible also makes a small room read larger.
The fit mistakes we see most often
- Buying to the width of the wall, not the room. A vanity that spans wall to wall with a few millimetres to spare looks built-in on paper and becomes an installation fight in practice. Leave a realistic gap or filler allowance.
- Forgetting countertop overhang. Many spec sheets list cabinet depth and countertop depth separately, and the top usually projects past the doors. The larger number is the one your walkway feels.
- Ignoring the trap and shut-off valves. Drawer-based vanities need room around the P-trap. Some models ship with notched or U-shaped drawers, some do not, and the spec sheet will say which.
- Mismatched faucet drillings. Countertops come pre-drilled for a single hole, a 4 inch centreset or an 8 inch widespread faucet. Confirm the drilling before you fall in love with a faucet, and make sure whatever you pair with it carries CSA or cUPC certification for use in Canada.
- Choosing the mirror first. A mirror or medicine cabinet generally reads best at the vanity's width or slightly narrower, so size the cabinet before you shop bathroom mirrors.
How to read a vanity spec sheet
Dimensions are normally listed as width by depth by height, but conventions vary by brand, so verify each number against the drawing rather than the summary line. Check whether the stated height includes the countertop and any backsplash, whether depth includes overhang and hardware, and what the sink cutout requires if the top is sold separately. For wall-mount models, note the recommended mounting height and the requirement for solid blocking in the wall: floating cabinets carry real weight, water included, and drywall anchors are not a plan. Finally, remember that the cabinet itself is furniture, but the faucet and drain you install with it are plumbing, which is where certifications and your local code actually apply.
A note on delivery in a Canadian winter
Vanities ship coast to coast, and in winter that means real wood and veneer components arrive cold and dry. Let the cabinet acclimatize indoors before installation, and unbox and inspect it promptly rather than leaving it crated in a garage. Wood movement between a freezing truck and a humid bathroom is normal, and a short indoor rest prevents most of it from becoming a problem.
Once your measurements are on paper, browse the full vanity collection with your width, depth and height limits in hand, and see our other bathroom planning guides for help with the fixtures that go around it.
Frequently asked questions
What is the most common vanity size?
For single-sink bathrooms across Canada, 30 and 36 inch widths are the workhorses, typically around 21 inches deep and between 32 and 36 inches tall. Double vanities most often land at 60 or 72 inches wide.
Does the listed vanity height include the sink and countertop?
Usually yes for floor-mount units with integrated or included tops, but not always, and vessel-sink configurations add the basin height on top of the stated figure. Check the dimensioned drawing on the spec sheet rather than the headline number.
How much space should I leave in front of a vanity?
Common design guidance calls for at least 21 inches of clear floor in front, with something closer to 30 inches being noticeably more comfortable. Actual minimums are set by the building code as applied in your province and municipality, so confirm locally before finalizing a layout.
Can I fit a standard vanity in a small powder room?
Sometimes, but a shallow-depth or wall-mount model is often the better answer. A 16 to 18 inch depth preserves the walkway, and a floating cabinet keeps floor visible, which helps a tight room feel larger without giving up storage entirely.
