How to Design a Bathroom for a Disabled Person: Step by Step

Short answer: Start with an occupational therapist's assessment, then design around the person: how they move, whether someone helps them, and how their needs may change. Plan the floor space and the shower first, then place the toilet, basin, rails and controls, and finish with contrast and good lighting. A 3D design lets you test the layout before any work begins.

A good accessible bathroom is not a list of products. It is a series of decisions, made in the right order, about one person and one room. Here is that process, step by step.

Step 1: Start with the person, not the products

The most common mistake is choosing fittings first and fitting the person around them later. Before you look at a brochure, write down how the bathroom is used now, and what is difficult.

An occupational therapist (OT) is the best person to help with this. In Scotland you can ask your council's social work department or local Health and Social Care Partnership for an assessment. The OT will look at how the person moves, washes and uses the toilet, and their recommendations can also open the door to council funding.

Useful questions to answer at this stage:

Does the person walk, walk with a stick or frame, or use a wheelchair some or all of the time?
How do they get on and off the toilet or a seat: sideways, from the front, or by standing and turning?
Does a partner, family member or carer help them wash? Do they need room to stand alongside?
Is there any sight loss, hearing loss, memory difficulty or reduced grip strength?
Is the condition stable, or likely to change over the next five to ten years?

This guide is general design advice, not medical advice. Your GP or OT should have the final say on what is safe for the individual.

Step 2: Match the design to the way the person moves

Once you know how the bathroom is used, the broad shape of the design usually follows. This table shows how different needs tend to steer the main decisions.

Who the bathroom is for	What matters most	Typical design response
Someone who walks with a stick or frame, or has poor balance	Not having to step over anything, something to hold, somewhere to sit	Low or level access shower, fold-down seat, grab rails at each point where they stand up or sit down, comfort height toilet
A wheelchair user who transfers independently	Space to turn, space beside the toilet and seat, everything within reach when seated	Wet room floor, clear transfer space on the correct side, wall-hung basin with knee space, controls at seated height
Someone who needs a carer to help them wash	Room for two people, a shower commode chair, controls the carer can reach	Larger open floor area, access to both sides of the chair, handheld shower on a riser rail, a door that opens outwards or slides
Someone with sight loss or dementia	Telling surfaces apart, finding things, a familiar feel	Strong colour contrast, even lighting, simple layout, taps and controls that look like taps and controls

Step 3: Plan the layout and the floor space

With the needs agreed, draw the room. Measure the walls, door and window, and mark where the soil pipe and drainage run, because those fixed points often decide where the toilet can go.

The door

An inward opening door eats into floor space and can be blocked if someone falls against it, so an outward opening or sliding door is usually better. The opening needs to suit the person's own wheelchair or walking frame, so measure the equipment rather than relying on a general figure.

Turning and transfer space

For wheelchair users, a 1500mm diameter turning circle is the usual benchmark. In a wet room the turning space can overlap the showering area, which is one reason wet rooms work so well in smaller homes. You also need clear floor space beside the toilet and the shower seat on the side the person transfers from. Our guide to how big a bathroom needs to be for a wheelchair goes through the measurements in detail.

If the room is not big enough, you can borrow space from a cupboard or hall, or create an accessible room elsewhere. Moving a loadbearing wall usually needs a building warrant in Scotland, so check with your council's building standards team before you commit to that route.

Step 4: Decide between a shower and a bath

For most disabled people, a shower is safer and easier than a bath. The question is which kind.

Level access shower or wet room: the floor is flush throughout, with a gentle fall to the drain. It suits wheelchair users, shower commode chairs and anyone who might later need them. A disabled wet room also makes the best use of a small room because there is no tray or enclosure.
Low tray walk-in shower: a very shallow tray that is easy to step onto. It can work well for someone who walks, but it is not suitable for wheeling in.
Bath with a bath lift, or a walk-in bath: worth considering for someone who values a bath and can transfer safely. Scottish guidance for public buildings allows at least 400mm of transfer space at the head of the bath.

Scottish guidance for public buildings uses a level access shower area of at least 1.2m by 1.2m, with a folding seat 500mm from a side wall. These are not rules for a private home, but they are a sensible starting point. If you want to see how all the space requirements come together, read our explanation of what a fully accessible bathroom is.

Step 5: Place the toilet, basin, rails and controls

The toilet

Position the toilet so the person can transfer from the side they find easiest, with a fixed rail on the wall side and often a drop-down rail on the open side. Public accessible toilets use a seat height of 480mm; at home, set the height to suit the person, which a wall-hung toilet makes easy. A flush lever on the transfer side, a backrest and a seat that contrasts with the pan all help. Some people benefit from a wash and dry toilet, which reduces the need for help with personal care.

The basin

A wall-hung basin with clear knee space underneath lets a seated user get close. Fit lever or sensor taps, keep the mirror low enough to be useful when seated, and put toiletries within reach rather than on high shelves.

Shower controls

A thermostatic shower protects against scalding, which matters for anyone with reduced sensation. Place the controls where the person can reach them from the seat, and where a carer can reach them without getting soaked. A handheld head on a riser rail works for both seated and standing use.

Grab rails

Rails go where the person stands up, sits down or changes direction. Plan solid backing in the walls before tiling, including where rails may be needed later.

Step 6: Get the contrast, lighting and finishes right

For someone with sight loss or dementia, a white toilet against white tiles can be hard to find. Contrast the floor with the walls, and rails, seats and the toilet with the surfaces behind them. Our guide to choosing the best colour for a bathroom suite covers colour choices that look good and work well.

Choose slip resistant flooring throughout, not just in the shower area.
Prefer matt or satin finishes over high gloss, which can cause glare.
Use bright, even lighting with no dark corners, and consider a low night light for trips to the toilet.
Make sure the extractor fan can cope with a wet room, so the floor dries quickly.

Step 7: Future-proof the design and test it in 3D

Design for the likely future as well as today. If a condition is progressive, allow floor space for a shower commode chair or a hoist, choose a level floor even if the person still walks, and reinforce walls for extra rails. It costs far less to build these in now.

Before work starts, see the design properly. Our free 3D CAD design service shows the turning space, rail positions and shower area so you and your OT can check them on screen. Our own team then carries out the plumbing, electrics, joinery and flooring to NHS and Occupational Health standards, and many installations take as little as 3 days.

If you are planning the whole project, our step by step plan for turning an existing bathroom into an accessible one covers funding, permissions and choosing an installer. If the changes needed are smaller, start with our guide to making a bathroom accessible for an older person.

Want to see your new bathroom before it is built? We will design it in 3D around the person who will use it, free of charge, with a no-obligation quote. Request your free 3D design.

Frequently asked questions

Do I need an occupational therapist before designing a disabled bathroom?

It is not compulsory, but it is strongly recommended, because it helps you avoid expensive mistakes. In Scotland an OT assessment is also usually needed if you want help from the council's Scheme of Assistance.

Is a wet room or a walk-in shower better for a disabled person?

It depends on how they move. A wet room or level access shower suits wheelchair users and shower chairs, and anyone whose mobility may decline. A low tray walk-in shower can suit someone who walks steadily but finds stepping into a bath difficult.

What height should a toilet be for a disabled person?

Public accessible toilets use a seat height of 480mm. At home there is no fixed rule, so the right height is the one that suits the person's transfer.

How to design a bathroom for a disabled person