Custom Bathroom Design: How to Plan One That Fits

Contemporary bathroom with bespoke vanity and shower

A custom bathroom is designed around the room you have and the people who use it, not picked from a catalog layout. That means measuring the space, working out who uses it and how, then choosing the layout, fixtures, materials, lighting and storage to suit. Done properly, the design is settled on paper and on screen before anyone touches a pipe. This guide covers what that process involves, the decisions that matter most in an Irish home, and what to ask a designer before you sign.

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TL;DR

Custom (or bespoke) design starts with a brief: who uses the bathroom, their routines, storage and bathing needs. Fixtures come second.
Measure accurately and test several layouts, with software, masking tape or cardboard cut-outs, before any plumbing is moved.
Storage, lighting and ventilation are where cheap redesigns fall down. Plan them at the start, not at the end.
If anyone in the household has reduced mobility, design access in from day one. Grant support may be available for accessible bathrooms.
A single team handling design, supply, installation and project management means fewer handovers and fewer surprises.

What custom bathroom design actually means
Start with a brief, not a mood board
Measure, then test the layout
Storage and space-saving ideas that work
Lighting, ventilation and finishes
Designing for accessibility
Our perspective: design first, then build
How a custom design project runs with us
Questions to ask any designer before you commit
Planning a bathroom in Kildare or Dublin?
FAQ
Sources

What custom bathroom design actually means

The phrase gets used loosely, so here is a working definition. Custom bathroom design tailors the room to the owner’s tastes, lifestyle and practical needs. That covers layouts, fixtures, materials, colors, storage, lighting and technology, all chosen for one specific room rather than bought as a standard suite.

In practice, the difference shows up in a few places:

The layout is drawn for your room. A narrow 1960s bathroom in Naas and a converted box room in Dublin 8 won’t share a sensible layout, even if the fixtures are identical.
Sizes are matched to the space. Vanity units, baths and shower enclosures are specified to fit, sometimes made to fit, instead of squeezed in.
Finishes work as a scheme. Tiles, flooring, sanitaryware, brassware and lighting are chosen together.
Details reflect how you live. Two basins for a busy family, a seated shower for a parent, a niche where the shampoo actually goes.

“Bespoke” and “custom” mean the same thing in this context. What separates a genuinely custom job from a standard one is whether the design starts with the room and the household or with a product range.

Start with a brief, not a mood board

Inspiration photos are useful, but they tell you what a room looks like, not whether it works. The more reliable starting point is a short written brief.

The Irish Examiner’s advice on small bathrooms is to begin by identifying who will use the room: whether children or pets need washing, how much storage is needed, whether two basins would help, and whether anyone needs to sit in the shower. Write those answers down. Then add:

Routines. Who is in the bathroom at 7:30 on a weekday morning? If it’s two adults and a child, a second basin may matter more than a freestanding bath.
Bathing preferences. Do you actually use the bath? Many households keep one out of habit. Converting it to a larger shower is one of the most common reasons people commission a custom design.
Storage. List what has to live in the room, and what you would rather hide.
Future needs. A bathroom is a 15 to 20 year decision. Think about children growing up, or your own mobility later.
The one thing you hate. Cold floors, a door that hits the toilet, a shower that never drains. Fixing the annoyance often shapes the whole layout.

Bring this brief to any designer. It makes the first consultation faster and the quotes easier to compare.

Measure, then test the layout

The step most people skip is also the one that prevents the costliest mistakes. Before replumbing, the Irish Examiner recommends accurate measurements and testing several layouts using design software, masking tape or cardboard cut-outs.

A simple way to do it yourself:

Measure the room’s length and width, plus the position of the door, window, radiator, soil stack and any boxed-in pipework.
Mark fixture footprints on the floor with tape: toilet, basin, shower tray, bath.
Stand in each space. Open the door. Sit on the toilet. Bend to reach the shower controls.
Check clearances and circulation, not only whether things technically fit.

Moving a toilet or shower waste is where cost and disruption climb, so the best layouts often keep key services where they are and change everything around them. A designer should be able to tell you which moves are cheap and which are not.

Awkward rooms are often the best candidates

Attic ensuites, under-stairs rooms and narrow bathrooms are where custom design earns its keep. The Irish Times notes that awkward rooms work better divided into purposeful zones, and that low areas can take built-in storage. In attic ensuites, toilets and baths may fit under lower roof areas, while showers and basins need full-height clearance. A standard suite rarely accounts for any of that.

Attic ensuite arranged around a sloped roof

Storage and space-saving ideas that work

Storage is routinely underestimated. Selfbuild.ie points out that people commonly under-plan storage and suggests keeping necessary but unattractive items out of sight. Its list of places to find space includes:

Under-basin storage and vanity units
Shelving and alcoves
Towel rails and hooks
Shower alcoves
The end of the bath and the back of the door

For small rooms, the Irish Examiner highlights curved shower doors, wet-room layouts, correctly sized vanities and baths, and sliding doors as ways to protect usable floor space. A recessed niche is another option: one Donegal family home used a shower shelf carved into a stud wall, which adds storage without costing any floor area.

Custom-made vanity units are worth considering when a standard width leaves an awkward gap. A County Meath project used custom-built vanity units to fit its bathroom spaces precisely, alongside hexagonal tiles and a black-and-white scheme chosen as part of one coordinated specification.

Lighting, ventilation and finishes

Lighting in layers

A single ceiling spotlight casts shadows across your face at the mirror. Selfbuild.ie recommends combining wall and ceiling lighting, with wall lights above or beside the mirror, and separates ambient, task and accent lighting. Alcove lights, backlit shelves and a heated demisting mirror are among its examples. Decide switch positions and any dimming at the design stage, because moving wiring after tiling is expensive.

Three bathroom lighting layers and examples

Ventilation is not optional

Moisture is what ruins a bathroom over time: peeling paint, blackened grout, failed sealant. Ireland’s Building Regulations apply to the design and construction of new buildings and extensions and include Part F on ventilation. Even where your renovation of an existing bathroom isn’t directly covered, the principle holds: specify a properly sized extractor fan and think about where the air will go. Selfbuild.ie recommends extractor fans in its guidance, and one Donegal home combined wall vents, mechanical inlet fans and openable windows.

Choosing materials for durability and style

The rule of thumb among those who build bathrooms for a living: spend on what is hard to replace, and be flexible on what is easy to change. Sanitaryware, waterproofing, tiling and plumbing fall into the first group. Paint, mirrors, accessories and towels are the second.

Selfbuild.ie advises choosing sanitaryware carefully for longevity and building the color scheme with the flooring and wall finishes rather than choosing each element alone. Some practical points we’d add:

Large-format tiles mean fewer grout lines to clean, and look calmer in small rooms.
A continuous tile treatment from floor to wall can make a narrow room feel cohesive. The Irish Times described exactly this in a narrow bathroom with a roof light.
Matte black and brushed brass look sharp, but check that the finish suits your water and your cleaning habits.
Always see physical samples in the room’s own light before ordering.

Designing for accessibility

An accessible bathroom no longer has to look clinical. The Irish Times recently reported that an accessible shower, grab rails and a flip seat can substantially improve daily life, and that safety features can be chosen so they don’t dominate the design.

If you’re planning for reduced mobility, consider:

A level-access, wet-room-style shower with carefully positioned fittings
Grab rails and a fold-down seat in the right places
Door width and turning space
Non-slip flooring
Adjustable lighting

The Department of Housing’s Technical Guidance Document M covers access and use, including accessible bathrooms and shower rooms, though how it applies depends on the building type and circumstances. For existing homes, the Irish Government’s home support guidance lists grab rails and an accessible shower among works that can improve access.

Funding is worth checking early. Citizens Information explains that the Housing Adaptation Grant for People with a Disability can be used for accessible bathroom facilities such as an accessible shower or a ground-floor bathroom, and for grab rails. Eligibility and amounts are set by your local authority, so confirm with them before you commit to a design or a contractor.

Our perspective: design first, then build

We’re a studio-based team in Naas, and our view is simple: most renovation stress comes from decisions made too late. When a layout is tested only after the plumber arrives, every change costs money and days.

That’s why we put the design stage first. We begin with an onsite consultation and survey, because a drawing is only as good as the measurements behind it. Then we build photorealistic 3D mockups in the studio, so you can see the room, the tiles and the fixtures together before work starts. Our AI Concept Engine speeds up the early part: you enter the room dimensions and style preferences and get layout and materials suggestions in seconds. It’s a starting point for a conversation with a designer, not a replacement for one.

We also think accessibility should be part of the design conversation for anyone, not a separate project. If a seated shower or grab rails may be needed now or later, we’d rather plan it into the room from the start, and we help clients with grant applications for accessibility renovations.

Finally, we keep design, supply, installation and project management under one roof. When the people who drew the room also fit it, the details survive the journey from the plan to the wall.

— David

How a custom design project runs with us

If you’re wondering what to expect, this is the sequence we follow, from first contact to completion.

Onsite consultation. We visit, measure and talk through your brief.
Concept and layout. We test layout options and materials, using the AI Concept Engine to produce quick suggestions.
3D mockups. We produce photorealistic visuals in the studio, so you can judge the result before committing.
Specification. Tiles, sanitaryware, vanity units, shower doors and lighting are chosen as a coordinated scheme. We supply products through our showroom, including tiles, wood floors, vanity units and Roman shower doors.
Installation and project management. One team manages the project from survey to completion.

We don’t publish prices, because a custom job depends on the room, the layout changes and the specification. We give a quote after the consultation, once we know what you actually need.

Questions to ask any designer before you commit

Whoever you choose, these questions separate a design service from a sales visit:

Will someone measure the room in person?
Will I see the layout and finishes rendered before I pay for materials?
Who manages the trades, and who do I call if something goes wrong on site?
Which layout changes will add plumbing work, and what do they cost?
Can you help with accessibility needs and grant paperwork?
Can I see completed projects near me?

That last one is easy to check with us. Our gallery shows finished bathrooms, tiles and flooring, and our local inspiration page collects projects across Kildare and Dublin.

Planning a bathroom in Kildare or Dublin?

We design, supply and fit bespoke bathrooms, luxury wet rooms and accessible refurbishments across Kildare and greater Dublin, and we also handle kitchen tiles and splashbacks, flooring and commercial or developer projects. See everything on our services page, or start from planbbathrooms.ie to book a consultation.

FAQ

What is the difference between custom and bespoke bathroom design?

Nothing meaningful. Both terms describe a bathroom designed around your room, household and preferences instead of chosen from a standard layout. What matters is the process behind the label: a measured survey, tested layouts and a coordinated specification.

How long should I allow for the design stage?

Allow time for a consultation, a layout you’re happy with and the selection of materials before installation is booked. Rushing this stage is the most common cause of mid-project changes. Ask your designer for a timeline specific to your room.

Can a small bathroom be custom designed?

Yes, and small rooms often benefit most. Options such as a wet-room layout, curved or sliding shower doors, correctly sized vanities and recessed niches can make a compact room work harder. Testing layouts before replumbing is especially valuable when every centimeter counts.

Is there help with paying for an accessible bathroom?

Possibly. The Housing Adaptation Grant for People with a Disability can cover items such as an accessible shower and grab rails, with eligibility decided by your local authority. We can help with grant applications for accessibility renovations, but check the current rules with your council first.