Small Bathroom Layout Plans Australia: 10 Smart Ideas

A tiny bathroom can still feel calm, easy to use and good to look at, but only if the plan comes first. In many Australian homes, especially older units, apartments and small ensuites, the room is barely 4 or 5 square metres, so a vanity that is a few centimetres too deep or a door that swings the wrong way can ruin the whole space. That is why small bathroom layout plans matter more than fancy tiles or expensive tapware: get the positions of the toilet, basin and shower right, and everything else falls into place.

This guide walks through ten practical arrangements for Australian homes, from a simple single-wall plan for a narrow room to a full wet room and an ultra-compact all-in-one module for a tiny ensuite. You will find real measurements in centimetres and metres, honest price ranges in AUD, clearances that keep the room comfortable, and storage ideas that work in humid summers and small rental units alike. Whether you are renovating in Sydney, updating a unit in Melbourne or planning an ensuite in Brisbane, there is a plan here that will suit your room, your budget and your daily routine.

Photo: via Wikimedia Commons. A compact bathroom with a glass shower, a toilet and a basin arranged so the walkway stays clear.

1. Try a Single-Wall Plan for a Narrow Room
2. Use a Three-Wall Plan for a Square Room
3. Choose a Galley Plan for a Long Room
4. Open the Room with a Wet Room Plan
5. Save Space with a Corner Shower
6. Keep a Bath with a Shower-Over-Bath Plan
7. Free the Floor with Wall-Hung Fixtures
8. Add a Mirrored Cabinet and Vertical Storage
9. Use Light, Mirrors and Glass to Feel Bigger
10. Fit Everything into an Ultra-Compact Module
Frequently Asked Questions
Final Thoughts

1. Try a Single-Wall Plan for a Narrow Room

Photo: via Wikimedia Commons. A walk-in shower and a basin arranged along the walls of a compact bathroom, leaving the floor open.

The single-wall plan puts the toilet, basin and shower along one long wall, in that order or in whatever order suits your plumbing, and leaves the opposite side completely clear for walking. It suits narrow rooms about 1.5 to 2 metres wide, which are common in Australian apartments and granny flats, because you never have to squeeze past a fixture sticking out into the walkway. Plumbing is also simpler and cheaper, since all the pipes run along one wall, and a full renovation using this plan often costs less than a plan that moves waste pipes all over the room. Keep the walkway at least 70 to 80 centimetres wide, choose a basin no deeper than 40 to 45 centimetres, and use a frameless glass shower panel rather than a solid wall so the room still feels open from the door.

Before you commit, tape the plan out on the floor with masking tape and live with it for a day or two. Check that the toilet has at least 20 centimetres of clearance on each side, that the shower is at least 90 by 90 centimetres, and that you can stand at the basin without your elbows hitting the wall or the shower screen. In a rental or a budget renovation, this plan is often the smartest choice: a compact wall-hung basin, a standard close-coupled toilet and a 90-centimetre shower can be fitted for roughly AUD 8,000 to 15,000 if you keep the plumbing where it is, while moving pipes and drains can quickly push the job past AUD 20,000. If your room is longer than it is wide, put the shower at the far end so your eye travels the full length of the room when you walk in.

2. Use a Three-Wall Plan for a Square Room

Photo: via Wikimedia Commons. A compact bathroom with the basin, toilet and shower spread across three walls, keeping the centre clear.

The three-wall plan is the classic answer for a square room of about 2 by 2 metres, or 4 square metres in total. Put the shower in one corner, the basin on the next wall and the toilet on the third wall, so the centre of the room stays empty and you can turn around without bumping into anything. This is the plan most Australian builders use for small ensuites because it balances the three jobs of the room — washing, showering and using the toilet — without giving any one of them too much space. A 90 by 90 centimetre corner shower works well here, and a basin about 45 to 55 centimetres wide is usually enough for one person, with a mirrored cabinet above it for storage. If two people share the ensuite, keep the basin a little wider and add a second towel rail rather than a second basin, which would crowd the room.

The trap with this plan is trying to fit a bath as well, which almost always makes a 2 by 2 metre room feel cramped. Unless a bath is essential for young children, choose a good shower and spend the saved space on a wider walkway and better storage instead. Allow at least 60 centimetres of clear floor in front of the toilet and the basin, use the same floor tile throughout so the room reads as one space, and keep the colours light. For a guide to how much room each fixture really needs, see this half-bathroom size guide, which is useful even when you are planning a full bathroom rather than a powder room. Budget roughly AUD 12,000 to 22,000 for a full three-wall renovation with mid-range fixtures in Australia.

3. Choose a Galley Plan for a Long Room

Photo: via Wikimedia Commons. A long, narrow bathroom with the basin along one wall and the door at the far end, a classic galley arrangement.

A galley plan suits a long room of about 2 by 3 metres, where fixtures sit on opposite long walls and the door sits on the short wall at one end. Put the basin on one side near the door, the shower on the other side, and the toilet at the far end, so each job has its own zone and nobody has to walk through the shower to reach the toilet. This plan works beautifully in older Australian homes where a bathroom was carved out of a long hallway or a spare bedroom, and it also suits an ensuite that runs alongside a bedroom wall. The key measurement is the walkway down the middle: aim for at least 80 centimetres, and if the room is only 1.8 metres wide, choose slim fixtures, such as a 40-centimetre-deep basin and a wall-hung toilet, so the walkway does not shrink to a corridor.

Light matters even more in a galley room, because a long, narrow space can feel like a tunnel if the far end is dark. Put the brightest light over the basin, use a large mirror on one long wall to bounce light back, and run the same light-coloured tile from floor to ceiling on the shower wall so the far end does not feel like a dead end. If there is a window, keep it clear of tall cabinets and use a frosted pane for privacy rather than a heavy curtain that blocks the light. A galley renovation with fixtures kept roughly where the old ones were usually costs AUD 10,000 to 20,000, while moving the toilet to the far end of the room can add AUD 1,500 to 3,000 in plumbing work, so only move it if the gain in space is genuinely worth it.

4. Open the Room with a Wet Room Plan

Photo: via Wikimedia Commons. An open bathroom with a wall-hung basin and a walk-in shower behind a single glass panel, in wet room style.

A wet room removes the shower tray and the shower door altogether: the whole floor is waterproofed, gently sloped to a drain, and the shower simply occupies one end of the room behind a single glass panel. For a small bathroom this is a powerful idea, because there is no step, no tray edge and no door swing to work around, so the room feels larger the moment you walk in. It also suits older Australians and anyone planning to age in place, since there is nothing to step over, and it makes cleaning easier because water can be hosed or mopped across the whole floor. In Australia, waterproofing must meet AS/NZS 3740, so this is not a do-it-yourself job: use a licensed waterproofer, choose slip-resistant tiles for the whole floor, and make sure the drain is a linear drain along the shower wall so water flows away from the dry side of the room.

The trade-off is that everything in the room gets a little wet, so the toilet paper, towels and any timber cabinet need to sit on the dry side, well away from the shower head. A glass panel of at least 90 centimetres, a shower head aimed away from the door, and a small step or a change in tile direction can all help mark the wet zone without building a wall. Keep the toilet and the basin on the dry side, add a heated towel rail on the dry wall so towels stay warm and dry, and budget a little extra for waterproofing: a wet room conversion in Australia typically costs AUD 15,000 to 28,000, with the membrane, drainage and tiling making up a large share of that figure. If your budget is tight, a walk-in shower with a low-profile tray gives you most of the open feeling for less money.

5. Save Space with a Corner Shower

Photo: via Wikimedia Commons. A corner glass shower beside a toilet and a basin, with a large round mirror opening up a small bathroom.

A corner shower tucks the shower into a corner that is often wasted, freeing the rest of the floor for the basin, the toilet and a comfortable walkway. A square 90 by 90 centimetre corner shower is the minimum most Australians find comfortable, while a 100 by 100 centimetre version feels noticeably roomier if you can spare the extra 10 centimetres. A neo-angle shower, with a diagonal door across the corner, can work even better in a tight room because the angled door opens into the room rather than swinging into a wall or a fixture. Choose clear glass rather than frosted glass for the shower screen, because clear glass lets your eye travel to the tiled wall behind it and makes the room feel bigger, and add a recessed niche in the shower wall for shampoo and soap so you do not need a hanging caddy that crowds the space.

Measure carefully before you order: the shower door needs room to open, or you need a sliding or fixed panel if there is no swing room. Allow at least 60 centimetres of clear floor in front of the shower door, keep the shower head at 200 to 210 centimetres above the floor, and choose a WELS 4-star or 5-star shower head to save water without losing pressure. A corner shower unit with glass and tiling usually costs AUD 1,500 to 4,000 installed, on top of the rest of the renovation, and it is one of the cheapest ways to gain a real sense of space. Readers often ask whether a corner shower is too small for daily use, and the honest answer is that 90 by 90 centimetres is fine for most adults, but if you are tall or you like a rain shower, go to 100 centimetres or choose a walk-in design instead.

6. Keep a Bath with a Shower-Over-Bath Plan

Photo: via Wikimedia Commons. A bath with a shower over it, a heated towel rail and a toilet arranged in a compact renovated bathroom.

If a bath is non-negotiable — for young children, for resale, or simply because you love a soak — the shower-over-bath plan is the most practical way to keep one in a small room. A standard Australian bath is 150 to 170 centimetres long and 70 to 75 centimetres wide, so it fits along one wall of a 2 by 3 metre room with room left for a basin and a toilet on the opposite wall or at the end. Use a fixed glass panel over the bath rather than a shower curtain, because the panel keeps water in, looks cleaner and does not cling to you while you shower, and choose a bath with a flat base and straight sides so you have a stable place to stand. Add a thermostatic mixer so the water temperature stays steady, which matters most when children use the shower, and fit a grab rail that doubles as a towel rail if anyone in the household needs extra support.

The downside, which Australian renovators mention often, is cleaning: water and soap scum collect around the bath rim and the glass panel, and the rim itself can be slippery when wet. Choose a bath with a wide, flat rim that is easy to wipe, run the same wall tile behind the bath and up to the ceiling so there are fewer ledges to collect grime, and keep a small squeegee in the shower niche for a quick wipe after each use. A shower-over-bath renovation usually costs AUD 12,000 to 22,000, depending on whether you keep the bath in the same position, and it is worth paying a little extra for a quality glass panel and a good exhaust fan ducted to outside, because steam in a small room quickly leads to mould if it has nowhere to go.

7. Free the Floor with Wall-Hung Fixtures

Photo: via Wikimedia Commons. A compact bathroom with a wall-hung toilet and basin unit beside a bath, leaving the floor visible underneath.

Wall-hung fixtures are one of the simplest visual tricks in a small bathroom: when you can see the floor running underneath the basin and the toilet, your brain reads the room as larger, even though the floor area has not changed at all. A wall-hung basin is usually 40 to 45 centimetres deep, compared with 50 centimetres or more for a floor-standing vanity, and a wall-hung toilet with an in-wall cistern hides the bulky tank inside the wall, leaving only the seat and a flush plate visible. Cleaning is easier too, because you can mop straight under both fixtures without working around pedestals and pipes. The catch is that the wall must be strong enough to carry the weight, and an in-wall cistern needs access for servicing, so ask your plumber to fit an access panel and to check the wall framing before you order anything.

Pair wall-hung fixtures with a floating timber or laminate shelf under the basin for folded towels, rather than a full cabinet that brings the bulk straight back. Keep the basin height at 85 to 90 centimetres above the floor, which suits most adults, and choose a toilet seat height of 40 to 45 centimetres for comfort. A wall-hung toilet with an in-wall cistern costs roughly AUD 800 to 2,000 for the unit, plus installation, while a wall-hung basin unit costs AUD 400 to 1,200, so this is a mid-range upgrade that pays off every day in a room you use first thing in the morning. If you are renting and cannot change the plumbing, a wall-hung-look vanity that sits just above the floor gives you most of the same visual benefit without any structural work.

8. Add a Mirrored Cabinet and Vertical Storage

Photo: via Wikimedia Commons. A mirrored wall cabinet above a compact basin in a bright, small bathroom with marble-look tiles.

In a small bathroom, storage has to go up, not out. A mirrored cabinet above the basin does two jobs at once: it hides toothbrushes, medicines and skincare behind a mirror, and the mirror itself doubles the sense of space by reflecting the room back at you. Choose a cabinet at least as wide as the basin, recess it into the wall if your builder can do so without hitting pipes or wiring, and fit a light above or inside it so you can see your face clearly in the morning. Add a tall, narrow cabinet or open shelves above the toilet for towels and spare toilet paper, and use the back of the door for hooks, which cost almost nothing and hold robes, towels and a hairdryer without taking any floor space at all. This vertical approach is also the answer to the reader question about where to put everything when there is no room for a linen cupboard: use the walls, the door and the space above the toilet before you buy any freestanding furniture.

Be ruthless about what actually lives in the bathroom. Keep only daily items in the mirrored cabinet, move bulk supplies to a hallway cupboard or a bedroom wardrobe, and decant large bottles into smaller ones so the shelves do not overflow. For ideas on keeping the inside of a vanity tidy once the plan is set, this bathroom vanity drawer organisation guide is a useful follow-up, because a tidy drawer makes a small basin area feel calmer every morning. A good mirrored cabinet costs AUD 200 to 800, a tall storage unit costs AUD 300 to 900, and a set of hooks and shelves costs under AUD 100, so this is one of the cheapest plans on this list and one of the most effective, especially in a rental where you cannot move walls or plumbing.

9. Use Light, Mirrors and Glass to Feel Bigger

Photo: via Wikimedia Commons. A bathroom with a large mirror over the basin, light stone tiles and a shower area kept visually open.

Once the fixtures are in the right places, light and reflection do the rest of the work. A large mirror over the basin, ideally running almost wall to wall, reflects light and the opposite wall and can make a 4-square-metre room feel half as large again. Layer the lighting: a bright, even light over the mirror for grooming, a ceiling light for general use, and, if you can, a small light inside the shower so the far corner does not fall into shadow. Choose light, neutral colours for the walls and floor — white, pale grey, soft sage or warm off-white — and use large-format tiles, such as 30 by 60 centimetre tiles, because fewer grout lines mean fewer visual breaks and a calmer, larger-looking surface. If the room has a window, keep it uncovered or use frosted glass so daylight can do its work all day.

Glass is just as important as the mirror. A clear glass shower screen, a glass shelf and a frameless mirror all let your eye travel through the room instead of stopping at a solid barrier, which is why a small bathroom with glass and mirrors feels bigger than the same room with a shower curtain and a small mirror. Avoid dark floor tiles in a very small room, because a dark floor can make the room feel like it is closing in, and avoid busy patterned tiles on every wall — use one feature wall if you love pattern, and keep the rest plain. Lighting upgrades are modest in cost, with a good mirror light and a ceiling light together costing AUD 200 to 600 installed, while a large mirror costs AUD 150 to 500, so this plan gives a large visual return for a small spend and works in both owned homes and rentals.

10. Fit Everything into an Ultra-Compact Module

Photo: via Wikimedia Commons. An ultra-compact bathroom module with a basin, bath and toilet fitted into a very small footprint.

For the very smallest rooms — a tiny ensuite, a studio apartment, or a bathroom squeezed under a staircase — an all-in-one module is worth considering. In this plan the basin overlaps the bath, the toilet sits beside the bath, and every centimetre is used, much like the compact bathroom modules used in Japanese hotels. It is not luxurious, and it will not suit a family bathroom that three people use at once, but for one person or a guest ensuite it can turn a room that seemed unusable into a fully working bathroom. The key is choosing fixtures designed for the job: a compact bath of 120 to 140 centimetres, a small round or corner basin, and a short-projection toilet that sits closer to the wall than a standard model. Keep the colours pale, use a single wall material so the room reads as one unit, and add a large mirror to stop the tight space feeling closed in.

Before you choose this plan, be honest about who will use the room and how often. If it is a main bathroom for a household, the compromises will frustrate you daily, and a better answer is usually to borrow space from an adjoining wardrobe or hallway, even if that means a bigger renovation. If it is a second bathroom, a guest ensuite or a studio, the module is a smart, affordable answer, often costing AUD 6,000 to 12,000 when the plumbing is already nearby. Check the clearances carefully — at least 60 centimetres in front of the toilet, room to stand at the basin, and a shower head you can actually stand under — and talk to your plumber early, because compact fixtures sometimes need different waste positions from standard ones. Done well, this plan proves that a bathroom does not need to be large to be complete.

Frequently Asked Questions

What is the smallest workable size for a full bathroom in Australia?

A full bathroom with a toilet, basin and shower can work in about 3.5 to 4 square metres, for example 1.8 by 2 metres, as long as the shower is at least 90 by 90 centimetres and there is 60 centimetres of clear floor in front of each fixture. Below that size, a shower-over-bath plan or an all-in-one module is usually more realistic than three separate fixtures. Always check your local building rules and talk to a licensed plumber before finalising a very small plan.

Should I choose a shower or a bath in a small bathroom?

Choose a shower if you want the most usable space day to day, because a shower takes roughly half the floor area of a bath and leaves room for a wider walkway and better storage. Choose a shower-over-bath plan if you have young children, if you love baths, or if you are renovating for resale and want to keep a bath option. A separate bath and a separate shower almost never fit well in a room under 5 square metres.

How much does a small bathroom renovation cost in Australia?

A basic small bathroom renovation in Australia usually costs AUD 12,000 to 25,000, depending on the size of the room, the quality of the fixtures and whether plumbing moves. Keeping the toilet, basin and shower in their existing positions saves thousands, while moving a toilet or a drain, adding a wet room membrane, or choosing stone benchtops and imported tapware can push the total past AUD 30,000. Always get at least three written quotes and confirm that waterproofing, tiling and waste removal are included.

Can I move the toilet in a small bathroom renovation?

Yes, but moving a toilet is one of the most expensive changes in a bathroom renovation because the waste pipe must fall at the right angle to the main drain, and in units the slab or the strata rules may limit what is possible. Moving a toilet a short distance along the same wall is usually manageable, while moving it to the opposite wall can cost AUD 1,500 to 4,000 extra. Ask your plumber to confirm the waste position before you fall in love with a plan that depends on moving it.

What is the best door for a small bathroom?

A cavity sliding door is usually the best choice for a small bathroom, because it slides into the wall and frees the roughly 0.5 to 1 square metre that a hinged door needs to swing open. If a cavity slider is not possible, a door that swings outward into the hallway is the next best option, as long as it does not block the hallway. A hinged door that swings inward should be a last resort in a tiny room, because it can block the toilet or the basin every time it opens.

Final Thoughts

The best plan for your bathroom is the one that fits your room, your household and your budget — not the one that looks best in a photo. Start by measuring the room properly, tape the plan out on the floor, and check the clearances in person before you order a single fixture. Keep the plumbing where it is if you can, choose fixtures sized for the room rather than standard sizes by default, and spend your money where it matters most: waterproofing, a good shower, a large mirror and storage that keeps the benchtop clear. With those choices made, even a 4-square-metre bathroom can feel calm, practical and genuinely pleasant to use every day, and that is the real test of a good plan.

If you are still unsure, show your taped-out plan to a plumber and a tiler before you sign anything, and ask them to flag any clearance or drainage problem while it is still cheap to fix. A small bathroom rewards careful planning more than any other room in the house, and the hour you spend measuring and testing the plan now will save you years of daily frustration later. For a fresh, natural touch once the renovation is done, see this guide to bathroom plants that absorb moisture, which suits the humid air of a compact bathroom.

Sources

Gallery

Photo: via Wikimedia Commons. A compact bath, basin and toilet arranged along two walls in grey tiles.

Photo: via Wikimedia Commons. A second view of a compact bathroom, showing how the basin, toilet and shower fit a small footprint.

Photo: via Wikimedia Commons. Floating vanity units with open shelving, showing how wall-hung storage keeps the floor clear.

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