Small Bathroom Renovation: Layout, Costs and Planning Guide
A small bathroom renovation succeeds or fails on the plan, not the tiles. Measure the room accurately, test several layouts on paper before anyone touches a pipe, keep the plumbing where it is if you can, and choose fittings that leave as much floor and wall visible as possible. Do that and a compact room can feel generous. Skip it and you pay for changes halfway through the job.
This guide covers what to decide first, which layouts work in tight Irish bathrooms, what to check in an older bathroom, the mistakes that cost the most, and how to approach the budget when every house is different.
TL;DR
- Draw the room to scale, with fixtures, before you buy anything. Test more than one layout.
- Moving the toilet or shower waste is usually the biggest cost driver. Check where the pipes run first.
- Wall-hung units, a frameless glass screen, large tiles and good lighting make the room look bigger.
- In an older bathroom, check waste pipes, water pressure and ventilation at the start, and insist on proper waterproof tanking in the shower.
- Fix the layout before work begins. Changing it mid-job costs time and money.
Table of Contents
- Start with the room, not the catalogue
- Layouts that work in a small bathroom
- Fixtures and storage that earn their space
- Tiles, colour and lighting
- Renovating an old or outdated bathroom
- Refurbishment without a full renovation
- What a small bathroom renovation costs
- Mistakes to avoid
- Our perspective
- Planning your project with Plan B
- Accessible and adapted small bathrooms
- FAQ
- Sources
Start with the room, not the catalogue
Most small bathrooms in Irish homes are somewhere between a box room and a slightly generous cupboard. Every 5 cm matters, so the first job is a proper survey: wall lengths, door swing, window position, ceiling height, and where the soil pipe and water supply enter the room.
The Irish Examiner’s Jennifer Sheahan recommends testing several layouts with accurate measurements before replumbing, and leaving about 53 cm between items so you can move comfortably. Selfbuild Ireland suggests using scale plans of the room and the fixtures to work out the arrangement, rather than trusting your eye in a showroom.
This is where we begin every project. Our studio produces photorealistic 3D mockups from your measurements, so you can see a layout before it exists. Our AI Concept Engine can also generate layout and materials ideas from your room dimensions and style preferences in seconds, which gives you a starting point to refine at the consultation.
Layouts that work in a small bathroom
There is no single best layout, but a few principles come up again and again.
Choose a shower over a bath
If the bathroom is the only one in the house, think carefully about whether you need a bath. Where you do not, a shower-only layout frees a surprising amount of space. Cosentino Ireland recommends considering a shower in place of a bath and using a transparent frameless screen so the eye travels to the back wall. If you are weighing this up, our guide to bathtub to shower conversion in Ireland covers the process.
For a tight footprint, the Irish Examiner points to curved shower doors, a wet-room layout and sliding doors as space-saving options. Selfbuild Ireland also mentions bifold shower doors for the same reason. A door that swings out into a room you can barely turn around in is wasted space.
Keep the toilet out of the sightline
Where possible, avoid placing the toilet directly in front of the door. Selfbuild Ireland makes the same point and adds a practical rule: check where existing water pipes run before relocating any sanitaryware, because moving it can be costly.
Cosentino Ireland suggests keeping the washbasin and mirror near the entrance, with the shower and toilet further back. The room then opens with a clean, bright view rather than the least attractive fitting.
Think in sightlines
A small bathroom feels smaller when there are visual barriers: a solid shower screen, a bulky pedestal, a bath panel running the full width. Glass, wall-mounted fittings and a deliberate view on entry all reduce them. It is the same thinking behind a good wet room, which is why a walk-in wet area often suits compact spaces. We design and fit luxury wet rooms for exactly this reason.
Fixtures and storage that earn their space
In a small room, everything must do a job. The RTE lifestyle guide recommends wall-hung vanity units and mirrored storage, plus a built-in shower shelf instead of a clutter of bottles on the floor of the tray.
| Choice | Why it helps in a small room |
|---|---|
| Wall-hung vanity | More visible floor makes the room read as larger |
| Vanity with drawers | Can replace a pedestal basin and add storage without much extra footprint |
| Mirrored cabinet | Combines storage with light and reflection |
| Wall-hung WC | Keeps the floor clear and is easier to clean around |
| Semi-recessed basin | Reduces projection into the room |
| Built-in shower niche | Removes shelves and caddies from the shower |
The Irish Times makes the point that each element should work hard: a vanity with drawers can replace a pedestal basin, and a mirrored cabinet can combine storage and lighting. Image Interiors notes that floating sink and storage units make a small room appear more spacious, and that keeping storage essential and unobtrusive limits visual clutter.
Selfbuild Ireland adds slim-depth fitted furniture to the list, and says a countertop over a concealed-cistern WC and basin can be a smart multifunctional fitting. Compact sanitaryware also comes in many widths and lengths, so a standard-size basin is rarely your only option.
We resell vanity units, tiles, wood floors and Roman shower doors, and our showroom team can advise on what will physically fit your room before you commit. You can see the range on our services page.
Tiles, colour and lighting
Finishes do much of the work of making a room feel bigger, and they are comparatively cheap to get right.
- Same tile, floor to shower. RTE advises using the same-coloured tiles across the floor and shower, which removes a visual break.
- Larger tiles. Fewer grout lines mean a calmer surface. Large formats also suit a small area better than many people expect.
- Floor to ceiling. Selfbuild Ireland recommends tiling all the way to the ceiling to draw the eye upward.
- Light beside the mirror. RTE suggests placing lighting beside the mirror, with separate spotlights, so your face is lit evenly rather than from above.
- Mirrors and glass. Large mirrors and glass shower enclosures keep the room from feeling cramped.
One caution on large tiles: they need a flat substrate, and in a tiny room the cuts around fittings matter. Good setting out, meaning where the first tile starts and where the cuts fall, is a skill of the fitter, not the tile.
Renovating an old or outdated bathroom
An older bathroom hides problems behind the walls. Before you fall for a shower or a vanity, check the basics.
- Waste pipes. The Irish Times advises checking where underfloor waste pipes lie and whether they can be adjusted. In an older house, this decides which layouts are realistic.
- Water pressure and pipe locations. The same guide says to check both before choosing a shower. A powerful-looking shower on weak supply is a disappointment you installed yourself.
- Ventilation. Think about it at the start, including whether you need a better fan. Old bathrooms often have a window and nothing else, which is a recipe for damp and mould on fresh paint and grout.
- Tanking. Ask for waterproof tanking in the shower area. It is hidden once the tiles go on, which is exactly why it must be right.
- Floor and walls. Once the old suite is out, you will see what you are really working with. Allow for repairs to uneven floors or damaged plaster.
If your bathroom is in a rented property, there are legal minimums to meet. Citizens Information explains that landlords must provide a sink with hot and cold water, a toilet, a fixed bath or shower and a permanently fixed heater, keep them in good working order, and ensure the room is well ventilated. If you are a landlord or letting agent, contact the local authority for the current standards before specifying work.
Refurbishment without a full renovation
Not every outdated bathroom needs ripping out. If the layout and the plumbing work for you, a lighter refresh can be sensible. SKC lists quick updates such as replacing taps, a toilet seat, repainting with bathroom paint and re-grouting tiles, and swapping a shower curtain for a screen.
Those are the cosmetic end of the scale. The point where a refresh stops making sense is usually when:
- the shower leaks or the tiles sound hollow
- the suite is cracked, stained beyond cleaning or hard to find parts for
- the layout itself is the problem, such as a door that hits the toilet
- there is persistent damp, which a coat of paint will not solve
In those cases, a full refit costs more now but avoids paying twice. If you are unsure which side of the line you are on, an onsite consultation answers it quickly.
What a small bathroom renovation costs
We do not publish fixed prices because the range is wide and depends on your room. What we can tell you is what moves the number most, in rough order:
- Moving plumbing. Relocating the toilet or shower waste is typically the largest single change in cost. Keeping fixtures where they are saves money.
- Specification. A mid-range suite and a designer one can differ enormously. Wall-hung fittings need concealed frames and are priced accordingly.
- Tiling. Floor to ceiling in a small room is less area than it sounds, so you can often afford a better tile.
- Shower type. A wet room needs more careful waterproofing and floor falls than a standard tray.
- Hidden work. Rotten floor boards, old pipework and electrics are discovered when the room is stripped.
The Irish Times quotes Sonas’s advice to visit a showroom, decide what you like and what will fit, then value-engineer by splurging on important items and choosing budget-friendly alternatives elsewhere. In a small bathroom that usually means spending on the shower, tanking and the fitter, and saving on accessories.
Because published ranges online vary widely between counties and specifications, the reliable approach is a written, itemized quote based on a survey. If you are thinking about how to fund the work, we have a guide to bathroom remodel financing in Ireland.
Mistakes to avoid
- Changing the layout once work is underway. The Irish Times is clear that this costs extra time and money. Lock the plan, including the position of every fitting, before the first day.
- Skipping tanking. Ask for it by name in the shower area.
- Buying before measuring. A vanity that is 5 cm too deep can block the door.
- Ignoring ventilation. A new bathroom with an old, weak fan will show damp quickly.
- Choosing a shower before checking pressure. Test first, then choose.
- Over-cluttering. Open shelves, caddies and too many accessories undo the benefit of a clean layout.
Our perspective
We think the biggest mistake in small bathroom renovations is deciding too late. People choose tiles, then discover the vanity will not fit, then discover the waste pipe sits in the wrong place.
That is why we put the design first. A survey, a thorough consultation and a photorealistic 3D mockup let you walk through the room before the first tile is ordered. Our AI Concept Engine gives you instant layout and materials ideas from your dimensions, and our studio team then turns the best one into a plan that is practical to build.
We also believe in one team from survey to completion. When the person who designed the room manages the installation, the details that matter in a small space, like where the cuts fall and how the glass meets the wall, are not lost in handover. Our aim is a streamlined, low-stress project in which the finished room is what you saw on screen.
David
Planning your project with Plan B
We design, supply and fit bathrooms across Kildare and greater Dublin, from compact family bathrooms to wet rooms and accessible refurbishments. The process runs from an onsite consultation and survey, through 3D mockups, to project management and installation by our studio team.
If you are ready to plan your small bathroom, start on our services page and tell us your room dimensions. For more on what happens at each stage, read about what to expect from a bathroom renovation service.
If you would like to see finished rooms first, browse our project gallery or local projects across Kildare and Dublin.
Accessible and adapted small bathrooms
Small bathrooms are often where accessibility problems show up first: a high bath edge, a tight turning space, no room for a carer. Replacing a bath with a level-access shower is the most common change.
The Housing Adaptation Grant for Disabled People supports works such as an accessible shower or a downstairs toilet. It is assessed on household income, and your local authority administers it, so check the current limits on the official page before you plan the budget. We help with grant applications for accessibility renovations, and you can read more on our accessible bathrooms page.
FAQ
How do I make a small bathroom look bigger?
Use a wall-hung vanity and WC so more floor is visible, a frameless glass screen instead of a curtain, large tiles in one colour from floor to shower, and a large mirror with lighting beside it. Floor-to-ceiling tiling also draws the eye upward.
What is the best layout for a small bathroom?
It depends on where your pipes are, but a common answer is a shower in place of a bath, with the basin near the door and the toilet and shower further back. Test several layouts on a scale plan, and leave about 53 cm between items to move comfortably.
What should I check before renovating an old bathroom?
Check where the underfloor waste pipes run, your water pressure, and whether the room needs a better extractor fan. Ask for waterproof tanking in the shower area, and fix the layout before work starts so you avoid paying for changes later.
Can I update a small bathroom without a full renovation?
Yes, if the layout and plumbing work for you. Replacing taps and the toilet seat, repainting with bathroom paint and re-grouting tiles can refresh the room. If there is damp, leaks or a poor layout, a full refit is the better investment.
Sources
- Jennifer Sheahan: How to design bathrooms for small spaces, Irish Examiner
- Bathroom layouts and clearances, Selfbuild
- Small bathrooms: the great secrets of their design, Cosentino Ireland
- How to make the most of a small bathroom, RTE
- Bathroom makeover guide, The Irish Times
- Small bathroom ideas we’re nabbing from these Irish homes, Image Interiors
- Five ways to update your bathroom, SKC
- Minimum standards for rented housing, Citizens Information
- Housing Adaptation Grant for Disabled People, gov.ie