Bathroom Vanity Sizes and Layout Planning Tips

The bathroom vanity you fall in love within a showroom can become your daily nemesis if it blocks the door or leaves you with nowhere to store your hairdryer. What seems like a minor miscalculation – just 150 millimetres here or there – can be the difference between a bathroom that flows beautifully and one that frustrates you every single morning.
It's a phenomenon that interior designer and renovator Anna Mitchell, who recently completed a heritage bathroom renovation in Sydney's inner west, has witnessed first-hand. "I can't tell you how many times I've had homeowners who find a vanity that they fall in love with, only to find that it doesn't work in their space," she says. "It's great if a vanity is technically the right size and looks stunning, but if it blocks the bathroom door or doesn't provide storage, you'll curse its good looks every day."
When choosing bathroom vanities, it's really about designing a space that works for everyone in your household, not just you. Whether it is a shoebox ensuite used by a couple or morning rush-hour traffic for a family of five, size really does matter.

Why the Size of Objects Matters More Than You Think

You walk into any bathroom showroom, and you are largely confronted with a huge selection of vanities. Floating, freestanding, single basin, double basin, drawers, cupboards, open shelving – the possibilities are endless. But before investing in that gorgeous American oak number with a Carrara marble top, careful assessment of the space is necessary. A well-proportioned hardwood bathroom vanity can elevate the overall warmth and character of the bathroom while still providing practical everyday functionality.
Your typical Australian bathroom is about 3m by 2m, and in apartments or older homes, the size of your space can be a lot smaller than that. This is where good measurements are key.
Before you shop, measure not just the vanity width but also the space around it, how the door swings, where the toilet sits and whether the shower screen might be in the way. If your layout is particularly tight or irregular, placing a vanity in corner of bathroom can be a clever way to unlock otherwise wasted space while maintaining comfortable circulation. If family members use wheelchairs or mobility aids, you'll need to factor in extra clearance too.

Standard Vanity Sizes Decoded

Knowledge of standard dimensions matters when it comes to visiting bathroom suppliers, such as The Blue Space, ABI Interiors or Reece.
Single Vanities: These vanities usually have a single basin and are available in range from 600mm to 1200mm wide. A compact bathroom is best served by a width of 750mm to 900mm. This is the right amount of ledge space for the everyday items (toothbrush holder, soap dispenser, skin care products) without being too overpowering in the room.
For tight spaces under 5sqm, you'd be surprised at how much a big 900mm vanity that's wall hung feels expansive. And the floating style makes your bathroom spacious. 900mm vanities strike the perfect balance between functionality and space efficiency in compact bathrooms.
For larger bathrooms or more spacious ensuites, 1200mm vanities will bring a luxury hotel feel to your space. They offer plenty of storage and bench space, and with a single basin, they can look sleek and uncluttered. 1200mm vanities are particularly popular among homeowners who want to create a spa-like atmosphere in their primary bathroom.

Double Vanity Considerations

A double vanity is ideal for a family bathroom, or even an ensuite with good wall space (at least 1500mm, preferably more). A double vanity makes for an easy morning.
Double vanities typically range from 1500mm to 1800mm wide, though they can stretch to 2100mm if required. A double vanity does more than just offer twin sinks — it boasts additional counter and storage space for tucking away blow dryers, razors and hairspray.
But a minimum 1800mm of uncongested wall space is required to fit a double vanity at optimal clearances for use in your bathroom. Try to shove it in a space too small and you wind up with an uncomfortable, cramped room.

Planning Your Bathroom Layout

Layout is the next important in planning for layout once space has been measured and estimated size of vanity established.
The absolute rule here: the vanity should be 200mm+ clear on each side. This isn't just aesthetic — it serves a function. And the clearance makes for easier cleaning around the vanity and adds to an overall sense of intention in the space.
If the vanity and the toilet are placed directly across from each other (a customary arrangement in a smaller bathroom), at least 760mm is advised as the minimum distance between them. This allows ample room for the knees and avoids that everyday irritation.
For a vanity alongside the shower, also account for the swing of the shower screen and possible splash. A floating vanity also works well in this setup as there isn't a kick board to collect water and mildew, if your plumber looks after the business end of things underneath.

Maximising Storage Space

Most of us have more bathroom products than we'd like to admit – hair serums, face masks, body lotions and multiple bottles of shampoo. Storage is key.
Vanity configuration becomes crucial here. Drawers are far more practical than cupboards – they're easier to organise, everything is visible at a glance, and with the right dividers, they make daily use so much simpler.
For vanities 750mm or under, we suggest options that offer maximum vertical space. Slim, shallow drawers or pull-out organiser units – such as the ones shown here – or mirrors that are recessed into the wall above it all provide usable storage without taking up precious floor space.

The Height Question

Commercial standard vanity height ranges from 850mm to 900mm, and this increase in available height is great for your spine, foot comfort, and general gear longevity.
The most versatile is the wall-hung vanity, which can be installed wherever it looks and feels best for your household. You'll also need to factor in the depth of the basin – if it sits too high on the benchtop, you'll find yourself hunching over it every morning.

Budget-Friendly Sizing Solutions

Custom vanities may not be cost effective for all renovations, but that doesn't mean you should let yourself be stuck with ill-fitting ones. Flat-pack vanities are now available in a range of sizes from IKEA, Bunnings' Kaboodle and Freedom Furniture. For example, Kaboodle's 'Sienna' 750mm wall-hung vanity cabinet (not including tapware, basin or benchtop) costs from $429, while Freedom's 'Newport' 1200mm freestanding unit ranges from $899 to $1,299 – compared with custom joinery starting at $3,000 to $5,000 for similar sizes.
The trick is knowing in advance what measurements you need. Measure multiple times, sketch out your layout, then measure again. Nothing's worse than buying a vanity and realising after it arrives that it's 50mm too big for the space.
It is a technique that Lucy Glade-Wright, founder of Hunting for George and renovator of a cabin in Victoria's Otways, has also embraced in her own renovations. "Overall, I wanted the style of the bathroom to be nostalgic and welcoming, embracing the small scale of the bathroom to make it feel as indulgent as possible," she says. "It's always a good idea to choose from a physical sample in the natural light of the space."

Creating a Bathroom That Works

Vanity sizing isn't the most glamorous side of a bathroom renovation, but nailing it separates a bathroom that only looks great in Instagram photos from one that works beautifully day to day.
Accurate measurements and thoughtful planning help to determine if the chosen vanity will work with (not against) the overall design and use of space. The time spent to properly size makes a difference every day, in a bathroom that works for the family. Bathroom Vanities should be selected based on both aesthetic appeal and practical functionality to ensure long-term satisfaction.
Whether you're working with a compact ensuite or a spacious family bathroom, the goal is the same: to create a space that looks beautiful and functions perfectly for your household's needs. Take your time with the measurements, consider how the space will be used, and don't be afraid to walk away from a vanity that doesn't quite fit – even if you love the look of it. The right vanity, properly sized and placed, will make your bathroom renovation worth every bit of effort.