Walk-In Shower Sizes: UK Tray Dimensions and Layouts
There is no single standard walk-in shower size in the UK. Most homes land between 900 x 900 mm at the compact end and 1700 x 800 mm or more where space allows. The right figure depends on your room, how the screen is positioned and who will use the shower. This guide gives you the numbers, explains what they mean in a real bathroom, and shows you how to choose with confidence.
TL;DR
900 x 900 mm is the smallest size generally recommended for a walk-in shower, and the largest tray that fits comfortably is the better choice.
Popular walk-in sizes run from 1400 x 800 mm to 1700 x 800 mm. Trays up to 2000 x 1000 mm are made for larger rooms.
Allow a shower entrance of roughly 700 to 800 mm, and a fixed screen at least 900 mm long (1200 mm or more keeps more water in).
For wheelchair access or a seat, plan for 1200 x 1200 mm at the very least, and 1500 x 1500 mm for wheelchair users.
Measure the whole room, not just the shower. Door swing, toilet and basin access and pipework often decide the size.
Table of Contents
Why walk-in shower sizes vary so much
A walk-in shower is an open or part-enclosed shower with no door, usually with one fixed glass screen. Because there is no door frame to fit, manufacturers do not work to one fixed footprint. A UK shower tray retailer notes there is no single standard tray size, with common dimensions running from 700 x 700 mm up to rectangular trays of 1800 mm and beyond.
That range is useful. It means you can fit a walk-in shower into a narrow London terrace bathroom or build a generous one in a whole-house refurbishment. It also means you need to decide the size around your room rather than pick a figure from a list.
Walk-in shower sizes at a glance
The table below pulls together figures from UK sources so you can see where your room might sit.
Size (mm) | Typical use | Notes |
900 x 900 | Practical minimum | The smallest size generally recommended for a walk-in shower |
1000 x 800 to 1400 x 900 | Compact to mid-size rooms | B&Q describes 1,000 to 1,400 mm lengths as a way to gain space without going to the largest trays |
1400 x 800 | Standard walk-in | Often quoted as a common walk-in size |
1500 x 700 | Long, narrow rooms | Suits a shower that runs along the end wall |
1600 x 800 | Comfortable walk-in | Works well with a fixed screen and a generous entrance |
1700 x 800 / 1800 x 900 | Larger bathrooms | Room to move without spray reaching the floor |
2000 x 900 / 2000 x 1000 | Spacious rooms, wet-room style | Extra-large trays available |
The 1400 x 800, 1500 x 700 and 1600 x 800 mm sizes are listed as standard walk-in sizes by a UK bathroom supplier. The tray range, from rectangular 700 to 900 mm widths up to 1,800 x 900 mm and 2,000 x 1,000 mm, comes from B&Q’s shower tray size guide.
The minimum size for a walk-in shower in the UK
There is no building regulation that sets a minimum shower size for an ordinary home. What you will find is guidance. Stoke-on-Trent City Council’s future-proofing guidance gives 900 x 900 mm as the minimum walk-in shower size and advises choosing the largest tray that fits comfortably. Geberit UK also says a comfortable shower area should be at least 900 x 900 mm, with a passage into it of at least 800 mm.
In practice, we treat 900 x 900 mm as a floor, not a target. A walk-in shower at that size works as a tidy enclosure, but you will not get the open feel people often want from the style. If you have 1200 mm of length to give, a 1200 x 800 or 1200 x 900 mm footprint is a far more relaxed place to wash.
Can a narrow tray work?
Some sources suggest narrower trays can work if you step in lengthwise. A 700 mm width is tight, and we would only use it where the alternative is no walk-in shower at all. If you are in that position, a longer tray, such as 1500 x 700 mm, gives you more usable floor than a 700 x 700 mm square.
What makes a walk-in shower comfortable
A tray size is only half the picture. Comfort comes from four measurements working together.
Floor area
Aim for the biggest tray the room can take without crowding the rest of the bathroom. B&Q makes the same point: larger trays are best fitted in bathrooms where they will not leave the remaining space feeling cramped. A 1600 x 800 mm tray in a bathroom with a tiny basin and a toilet squeezed beside it is no improvement on a 1200 x 800 mm tray with room to breathe.
Entrance width
The council guidance suggests an entry width of 700 to 800 mm, and Geberit UK suggests the passage should be at least 800 mm. We would plan for 800 mm wherever possible. It makes the shower easier to get into, and easier to clean and to dry yourself in.
Screen length
The same council guidance says the enclosing wall should be at least 900 mm long, and that 1,200 mm or more helps keep water in. This is the figure that most affects whether a walk-in shower feels pleasant or leaves you with a wet floor. The longer the fixed screen, the more spray it catches. If your shower is only 800 mm wide, a screen on the long side can still do the job when it is placed between you and the open end.
Showerhead height
The guidance specifies a showerhead height of 2,000 to 2,100 mm. Check this against your ceiling, especially in lofts, under stairs or in rooms with sloping ceilings, where a standard rain head might not sit where you expect.
Layouts that work in real bathrooms
The same tray size behaves very differently depending on where it sits in the room. These are the layouts we meet most often in London homes.
The alcove walk-in
This is the classic. The shower sits in a recess, with walls on three sides and a single fixed screen at the open end. A 1400 x 800 mm or 1600 x 800 mm tray suits a standard-width bathroom very well. Since three sides are already walls, you only pay for one glass panel and the tiling is simple.
The end-of-room walk-in
Where a bath used to sit across the end wall, a walk-in shower takes its place. A 1500 x 700 mm or 1700 x 800 mm tray lines up with the old bath footprint and rarely requires you to move the soil pipe. If you are weighing a bath-to-shower swap, our guide to bathroom layouts shows how the room can be arranged around it.
The corner walk-in
A corner position uses two walls and a screen that runs along the open side. Square sizes of 900 x 900 mm or 1000 x 1000 mm are common, and they suit smaller rooms. Always check the swing of the bathroom door, as a shower screen that clashes with it is a classic planning error.
Small bathrooms
A walk-in shower does not always need a large room. Villeroy & Boch notes that its clean lines and clear glass can make a space look larger, which is why it often suits small bathrooms. For more on getting a compact room right, these small bathroom remodelling ideas look at reclaiming space and avoiding common planning mistakes. In London homes we also look at wider space-saving ideas in our guide to making the most of small London homes.
Is a 5 x 6 ft shower too big?
A 5 x 6 ft footprint is roughly 1524 x 1829 mm. That is larger than the biggest common walk-in trays, such as 1800 x 900 mm, so it is more of a generous wet-room than a standard walk-in. In a big bathroom it can feel luxurious and gives you space for a bench, double heads or a wheelchair-friendly layout. In an average UK bathroom it will take up most of the room, leaving little for a toilet, basin and storage.
We would only recommend this footprint when the room is clearly larger than it needs to be. If you are unsure, a 1700 x 800 mm or 1800 x 900 mm tray gives the open, spacious feel with far less impact on the rest of the layout.
Accessible and future-proof walk-in showers
If you are planning for a family member with limited mobility, or want a bathroom that suits you for decades, bigger numbers apply.
Sitting comfortably: Villeroy & Boch advises at least 1200 x 1200 mm so you can use a folding seat without bumping into the walls.
Wheelchair users: the same source recommends a floor area of at least 1500 x 1500 mm.
Barrier-free showers: Geberit UK states that a barrier-free shower should be at least 900 x 1,100 mm and have no ledge. It also points out that a tray with a ledge, however shallow, is not fully barrier-free.
Manoeuvring space: for an accessible floor-level shower, CAE’s Lifetime Homes guidance calls for a clear 1500 mm circular or 1700 x 1400 mm elliptical manoeuvring zone.
The council guidance also says access to the toilet and basin should not run through the shower area. It is a simple layout rule, and it matters more than most people expect. CAE also advises provision for future floor-level shower drainage when a bathroom is designed with later adaptation in mind. If you think you might want a level-access shower later, it is far cheaper to plan the floor build-up and drainage now. We cover how waste and supply routes affect the layout in our bathroom plumbing layout guide.
How to choose your walk-in shower size
Measure the whole room. Note wall lengths, door swing, window position and the location of the soil pipe.
Fix the position of the toilet and basin first. The shower should never be reached through them, or them through it.
Choose the longest tray that leaves comfortable clearance. Aim for at least 900 x 900 mm and go larger where you can.
Plan the screen. A fixed panel of 900 mm is the minimum, and 1200 mm or more helps contain water.
Check the waste and floor. A low-profile tray needs less build-up, while a level-access floor needs a proper fall to the drain and good waterproofing.
Think about who will use it. If a seat, a carer or a wheelchair may be involved later, move up to the accessible sizes above.
Choose tiles that suit the footprint. Large-format tiles mean fewer joints in a small shower. Our guide to selecting bathroom tiles goes through the options.
The storage side matters too. A walk-in shower with no door has less hidden space, so niches and shelves need to be planned before tiling. Our bathroom storage ideas can help you decide where to put them.
Our perspective
Most homeowners start by asking which size is best. After years of refurbishing bathrooms across West and Central London, we think the better question is which size fits the room properly. A tray that is 200 mm too big can leave a toilet door that will not open fully. A tray that is a little smaller can free enough space for a good vanity unit and storage.
We work in-house and under director oversight, so the person who surveys your bathroom is involved in how it is built. That means we can flag problems at the site visit stage: a soil pipe in the wrong place, a floor that needs strengthening, or a ceiling too low for the showerhead you have chosen. Fixing these on paper costs far less than fixing them on site.
Our advice is simple. Choose the largest shower that suits your room without hurting the rest of the layout, think ahead for how you will use it in ten or twenty years, and let a survey confirm the numbers before you buy a tray.
— Mateja
Planning a walk-in shower with us
If you are ready to turn measurements into a finished bathroom, our team can survey your space, advise on tray size and screen position, and handle the plumbing, tiling and electrics under one roof. See our bathroom refurbishment service or our page on bathroom renovation in London to arrange a site visit.
FAQ
What are the standard sizes of shower trays in the UK?
There is no single standard. Common trays run from 700 x 700 mm up to 1800 mm and longer. B&Q lists rectangular widths of 700 to 900 mm, lengths of 1,000 to 1,400 mm, and larger walk-in sizes including 1,600 x 800 mm and 1,800 x 900 mm.
What is a good size for a walk-in shower?
For most UK bathrooms, 1400 x 800 mm to 1600 x 800 mm is a comfortable range. It gives you room to move and a wide entrance. If space allows, 1700 x 800 mm or larger feels more generous.
What is the minimum size for a walk-in shower?
The guidance we have seen gives 900 x 900 mm as the minimum, and recommends choosing the largest tray that fits comfortably. Narrower layouts, such as 700 mm wide, can work in very tight rooms but are less comfortable.
Is a walk-in shower suitable for a wheelchair user?
It can be, but it needs more space and a level floor. A floor area of at least 1500 x 1500 mm is recommended for wheelchair users, and a barrier-free design should have no ledge. A tray with a lip is not fully barrier-free, so ask for a professional survey before you commit.
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