By 
Combining a bathroom and laundry is the most common way Australian homeowners claw back a room in smaller homes, and it fails on the same detail every time: someone orders joinery to fit a 600mm machine. A 600mm front loader does not fit a 600mm cabinet opening. Fisher & Paykel specifies a minimum recess of 870 x 640 x 650mm, and Samsung Australia asks for 25mm clearance each side. Build 600 and the machine goes back on the trailer.
The two numbers that decide the layout
650mm is the cabinetry opening. Order that, not 600.
1,075mm is the depth from the back wall to the front of an open washing machine door, the number nobody measures and the one that decides whether the room works. Allow 1,000mm of clear floor in front of the machine: the door alone eats 420–550mm and you need the rest to crouch and load.
In a bathroom under about 1.9m wide, that arithmetic settles the layout for you, and it rules out most of the layouts you will have saved while you search. A corner position rarely helps, it usually makes the door swing worse, not better. The washing machine and the vanity cannot face each other across the room. They go on the same wall, the practical answer and the cheapest one, because keeping the plumbing for the vanity and washing machine on the same wall means one set of pipework rather than two runs across the floor.
Concealing the appliances
Nobody wants a washing machine on show, and that single anxiety drives most bathroom laundry combo design. Concealing appliances behind cabinetry enhances the room’s aesthetic more than any other decision here, and of all the design trends in this space it is the one every modern bathroom of this type is built on. Conceal appliances behind cabinetry for a cleaner look and the room reads bathroom-first, concealed appliances create a calming bathroom-first feel and a relaxing bathroom environment rather than a utility space you also happen to shower in.
Three ways to hide them, in rising order of cost:
Bifold or pocket doors. Using bifold or pocket doors conceals laundry appliances when not in use, and they beat a traditional hinged door because a hinged cupboard needs swing space you have already spent. Opt for either and you buy back floor area for nothing. An internal bifold door is about $330 at Bunnings; a cavity slider installs for $900–$3,000.
Built-in cabinetry. Built-in cabinets create a streamlined look and offer ample storage, and built-in cabinetry helps keep the space clutter-free. Custom laundry joinery runs $4,000–$12,000; a flat-pack cupboard on a 600mm Kaboodle base cabinet starts at $151.
Floor-to-ceiling. Full-height cabinetry provides more storage in small bathrooms by using the otherwise dead wall above the appliances. Floor-to-ceiling cabinetry can include pull-out hampers and shelving, and integrated pull-out hampers help keep dirty clothes off the floor, in a combined room, that is the difference between a bathroom and a laundry with a shower in it.
Open shelving works for towels, but only with discipline. Using matching caddies can keep open shelving looking organised; mismatched bottles are exactly the visual clutter the cabinetry was meant to solve.
Stack, or go under the benchtop?
Stacking a dryer above a washing machine saves floor space, and stacking appliances frees valuable floor space for storage, usually a full-height cupboard you would not otherwise have. Use the manufacturer’s stacking kit; a strap between two machines is not it.
The alternative is positioning appliances under the benchtop, which creates a folding station and gives you a continuous run of countertops at standard height, a real convenience if the room ever doubles as the family’s only laundry. It costs you the tall cupboard, so it is the better choice when the room is wide rather than tall.
A washer-dryer combo can eliminate the need for multiple appliances in one 600mm footprint, which lets you save the double cupboard entirely and is the neatest answer for a couple or a small household. It is the weakest choice for everyday family life, though. Explore the trade-off honestly before you commit: combos dry a much smaller load than they wash, and a full cycle takes hours.
One appliance detail worth getting right: choose a heat-pump or condenser dryer over a vented one. A vented dryer needs its own duct to outside, separate from the exhaust fan, a $200 job becomes a $900 one.
Ventilation is the whole ballgame
This is the part most combined rooms get wrong, and where careful planning pays off. Ventilation requirements for bathrooms and laundries address moisture load, and the two are not the same: under the National Construction Code a bathroom needs 25 litres per second of mechanical extraction, a laundry 40.
A combined bathroom-laundry contains a laundry. Size the fan to 40 L/s. Fitting a standard 25 L/s bathroom fan and then washing and drying in the room is how these spaces grow mould in their first winter.
Two rules changed under NCC 2022 and catch renovators out. The fan must discharge to outdoor air, venting into the roof space is no longer permitted. And with no compliant window, it must be interlocked with the light switch and run on 10 minutes after you flick it off.
Good ventilation prevents mould in combined bathroom-laundry spaces, and it is the only thing in the room that will reduce humidity fast enough to matter. Ventilation is essential in high-moisture combined spaces for a reason worth stating plainly: you are adding a machine that dumps warm water vapour into a room that already runs a hot shower twice a day. Installing the right fan is the cheapest insurance in the project, at $550–$1,200 installed. Black spotting on the ceiling above the machine is the first sign you fitted the wrong one.
Waterproofing and the floor
Continuous waterproof flooring creates a unified wet area design, and here it is close to compulsory anyway. Under NCC Specification 26 a laundry floor without a floor waste need only be water resistant, but with a floor waste, the entire floor and all wall-to-floor junctions must be waterproof. Most Australian bathrooms have a floor waste, so a conversion lands on full-floor waterproofing either way.
Run one floor finish through the whole room rather than changing material at the laundry zone. It is a wet area throughout, cheaper to waterproof as one job, and it stops a small room being visually cut in half.
Making it read as a bathroom
The design goal is a beautiful bathroom that happens to wash clothes, and consistent finishes are what carry the style across. Using consistent finishes unifies the bathroom and laundry areas, same cabinetry colour, same handles, same tapware finish across the vanity and the laundry cupboard. Matching the fixtures matters as much as the cabinets: the moment the laundry joinery differs from the bathroom joinery, the eye finds the join and the room shrinks. One example, same matte black tapware on the vanity, same handles on the laundry cupboard, and the two zones stop reading as two rooms.
Light colour schemes and reflective surfaces make spaces feel larger, and using a wall-hung vanity improves the visual space in a small bathroom by leaving floor visible underneath. Mirrors do the rest.
Layered lighting enhances functionality in multifunctional spaces, because a combined room has two jobs and one downlight cannot do both: ambient light from the ceiling, task lighting at the mirror, and something under the cabinetry over the benchtop where you sort and fold.
Natural stone and warm metallics add refined finishes to spaces and lift a small combined room out of laundry territory. Keep it to one stone and one metal, a third finish is one too many.
Drying without wrecking the room
The last thing to plan is where wet clothes go, and it is usually the first thing forgotten. Vertical drying racks allow air drying without blocking walkways, and they are one of our favourite ideas for this room. A wall-mounted rack that folds flat over the bath gives you somewhere to hang a load, keeps the floor clear, and stays within easy access of the machine.
Be realistic about what indoor drying does to a room you have carefully ventilated: if clothes dry inside regularly, run the fan while they do.
Getting the order right
Confirm the appliance recess and door swing first, then the wall the plumbing shares, then the ventilation rate, and only then cabinetry, finishes and lighting. Each one constrains the next.
Incorporate them in that order and a bathroom laundry combo is one of the best moves available in a small house, creating a second functional room for the price of good planning and practicality, you get a functioning laundry for the cost of some joinery and a bigger fan, in a room you were already renovating. Do it backwards and you end up with beautiful cabinets that a washing machine will not fit into.
