Bathroom Vanity Design: Dimensions, Layouts and Styling Rules

Bathroom Vanity Dimensions to Consider

Standard measurements are useful starting points, but the ideal size depends on the users, basin type, room width and circulation space. Here are some questions you need to answer before choosing your vanity:

What Is the Right Bathroom Vanity Height?

So, what is the right height for a bathroom vanity? In many Australian homes, the finished basin rim sits approximately 850 to 900 millimetres above the floor. An above-counter basin adds height, so the cabinet may need to be installed lower. Inset and undermount basins usually allow the benchtop to sit closer to the desired finished level.

Always check the combined height of the cabinet, benchtop and basin. A plan may look right but still feel awkward if the basin rim is too high or low for the people using it.

Choosing a Small Bathroom Vanity

Compact bathrooms require careful planning because every centimetre counts. A narrow unit can work well, but it still needs enough room for handwashing, storage and movement.

Wall-mounted tapware may free up benchtop space, while a semi-recessed basin can provide a generous bowl without requiring a full-depth cabinet. Light finishes and a floating design can also make the room feel more open. Leaving some breathing room will also make cleaning easier.

Choose a Layout That Supports Daily Routines

The best layout is based on how the bathroom will be used. Consider who uses the room, what needs to be stored and whether several people often get ready at the same time.

Check the swing of the entry door, shower screen and cabinet doors. Drawers should open without hitting the toilet, towel rail or adjoining wall. There should also be enough standing room in front of the basin without blocking the walkway.

Wall Hung Bathroom Vanity or Floor-Mounted Design?

A floating unit can make a compact room feel more spacious because more of the floor remains visible. It also makes cleaning easier and allows the installation height to be adjusted more precisely.

A floor-mounted design creates a more substantial, furniture-style look and may provide additional storage. It can also suit renovations where plumbing comes through the floor.

The right choice depends on plumbing, storage, wall structure and style. Wall-mounted cabinetry also needs suitable support.

Centred or Offset Basin Layout?

A centred basin creates a balanced appearance and works particularly well with a single mirror or symmetrical lighting. It is a straightforward option for guest bathrooms, powder rooms and smaller ensuites.

An offset basin places the bowl closer to one end of the benchtop, leaving a longer area of clear counter space on the other side. This can be useful for makeup, grooming products, hand towels or everyday toiletries.

Offset layouts may also allow for wider drawers, as the plumbing can be concentrated in one part of the cabinet rather than running through the centre. The best position will depend on the room entry, mirror placement and whether the user is left- or right-handed.

Single Basin With an Extended Benchtop

A single basin paired with a longer benchtop can be an effective alternative to a double-basin arrangement. It provides generous preparation space while retaining more room for drawers and cupboards below.

This layout can work well in a family bathroom where several people use the room but do not necessarily need to use separate basins at the same time. The additional bench area can hold baskets, grooming items or decorative accessories without crowding the basin.

It also allows a larger mirror to be installed, helping the room feel wider and brighter.

When Does a Double Bathroom Vanity Make Sense?

Two basins can be convenient in a shared ensuite, but the room needs enough width for elbow room, practical drawers and clear bench space.

In a smaller room, one generous basin with more storage may be more useful than two cramped basins. The goal should be to improve the daily routine rather than simply fit in another fixture.

Consider how the basins, mirrors, lights and drawers align. Symmetry can create a calm look, while an offset basin may provide more uninterrupted counter space.

Wall-to-Wall Custom Cabinetry

Where the room has a clear uninterrupted wall, a wall-to-wall design can make full use of the available width. Custom cabinetry can be shaped around side walls, windows, plumbing and unusual room dimensions, reducing awkward gaps where dust and moisture may collect.

This option can provide more storage than a freestanding unit and create a clean, built-in appearance. It is particularly useful in larger family bathrooms or ensuites where storage is a priority.

The cabinet does not need to be filled with two basins. A single basin, wide drawers and open benchtop space may provide a more flexible result.

Corner and Compact Layouts

A corner layout may suit a narrow powder room, small ensuite or bathroom with limited uninterrupted wall space. Positioning the basin in a corner can preserve the central walkway and make use of an area that might otherwise remain empty.

Compact designs may include a shallow cabinet, wall-mounted tapware or a semi-recessed basin. These features can reduce the overall projection into the room while maintaining a practical bowl size.

Corner units need careful planning to ensure the user has enough shoulder room and that doors or drawers can open freely.

Open-Shelf or Mixed-Storage Designs

Not every design needs to rely entirely on closed cupboards. Combining drawers with an open lower shelf can create a lighter, more relaxed appearance while providing easy access to towels or storage baskets.

Open shelving can make a large cabinet feel less visually heavy, particularly in a coastal, contemporary or spa-inspired bathroom. However, it works best when the contents can be kept organised.

A mixed-storage layout offers a practical balance: drawers keep smaller toiletries out of sight, while open shelves hold attractive or frequently used items.

Coordinate the Basin, Tapware and Plumbing

Above-counter, inset, undermount and semi-recessed basins each require different cabinet heights, benchtop cut-outs and drawer configurations.

Tapware should be planned early. Bench-mounted mixers need room behind or beside the basin, while wall-mounted taps require concealed plumbing to be positioned before waterproofing and tiling.

Drawers may also need cut-outs around the waste trap. Confirm plumbing positions before cabinetry is manufactured, particularly when moving water or waste points. Keeping services in their existing location may reduce renovation complexity, but it should not force an impractical layout.

Plan Storage Around What You Use

Another consideration you have to look into is adding storage. Before choosing drawers and cupboards, list the toiletries, towels, cleaning products and grooming appliances that need a home.

Wide drawers are often easier to use than deep cabinets because items remain visible and accessible. Shallow drawers can hold smaller products, while deeper drawers may suit bottles, hair dryers and folded towels.

Internal dividers can reduce clutter, while concealed power and a mirrored cabinet can improve everyday storage. Preserve some clear benchtop area rather than allowing an oversized basin to dominate it.

Styling Rules for a Cohesive Finish

Treat the cabinetry, basin, mirror, lighting and tapware as one composition rather than separate purchases.

Take note of your bathroom’s layout and design. Match the scale of the unit to the room. Slim profiles and floating cabinetry suit smaller spaces, while larger bathrooms may accommodate deeper drawers, thicker benchtops and more substantial finishes.

Keep the material palette controlled. Timber tones can soften stone or tile, while painted cabinetry can create a clean, timeless result. Repeating the tapware finish in handles, mirror frames or lighting can help connect the design.

Align the mirror with the basin arrangement rather than automatically centring it on the cabinet. A wide mirror can broaden the room, while separate mirrors can reinforce symmetry. Use wall lights, an illuminated mirror or well-positioned downlights to reduce shadows around the face.

Common Bathroom Vanity Design Mistakes

Common mistakes include:

• Forgetting the benchtop overhang when measuring
• Installing an above-counter basin at an uncomfortable height
• Blocking the entry door or shower screen
• Choosing two basins without enough usable width
• Failing to allow for plumbing inside drawers
• Leaving too little standing or circulation space
• Confirming electrical positions after ordering the cabinetry

Careful planning can prevent expensive changes and produce a more comfortable result.

Design a Bathroom Vanity Around Your Space

Standard sizes can help you begin, but the best design will respond to the room, the people using it and the storage they need.

Custom cabinetry is especially useful in narrow ensuites, unusual layouts and shared bathrooms where standard products may waste space. It also gives you greater control over drawers, basin placement and finishes.

Craftbuilt Kitchens can help you plan cabinetry that works with your bathroom layout and complements the rest of your home. By considering dimensions, plumbing, storage and style together, you can create a room that feels practical, balanced and made for everyday living.

Disclaimer: Images on this blog used to portray the different bathroom vanity options you can consider for your home are for illustration purposes only. For actual options and samples, please contact our showroom and designers to see what you can work with.

FAQs About Bathroom Vanity

What is the standard height for a bathroom vanity?

A finished basin height of around 850 to 900 millimetres is common in Australian homes. The cabinet may need to sit lower when an above-counter basin is used.

Is a floating unit suitable for a small bathroom?

A floating design can make a compact room feel more open because more of the floor remains visible. It can also make cleaning easier, although the wall must provide suitable support.

Is one basin or two better?

One basin usually provides more storage and usable bench space. Two can be convenient in a shared ensuite when the room is wide enough to accommodate them comfortably.

Should the mirror be the same width as the cabinet?

Not necessarily. A mirror that is slightly narrower often creates a balanced result. Its position should relate to the basin, lighting and overall wall composition.