Standard Door Sizes UK: Width, Height, and Minimum Size by Type

19 May 2021
Updated 20 April 2023

The standard door sizes in the UK are a little different than they are in North America and other parts of the world. In this blog post, we will talk about what the standard width and height of internal and external doors is for homes in the UK, as well as what size front door you should have on your home.

The most common door size in the UK is 2’6” (1981 x 762 x 35mm)

Let’s dive into more detail about the specific sizes of doors. But keep in mind that doors can be made to measure, and theoretically, you could have a door in a wide variety of sizes, so this is just a guide.

Standard door sizes for internal and external doors in the UK

Doors come in all sorts of shapes and sizes. When we say doors, you might think of a front door, or a bedroom door, but actually, doors are everywhere, from cupboards to wardrobes, interior to exterior.

Here are the most common door sizes in the UK.

Door sizeDoor type
1981 x 762 x 35mm (2’61”)Internal door
1981 x 838 x 35mm (2’9”)Internal/external door – where wheelchair access is required. Conforms to Part M building regulations
1981 x 610 x 35mmInternal/external door – often used in places where a smaller door is more suitable, or where there may be restricted space
1981 x 457 x 35mmCupboards and wardrobes

No set requirements on door sizes

You’ll often find doors do vary in size at some points. Whilst there are standard sizes and minimum size recommendations, it is possible to come across doors that are much smaller or much larger. Smaller doors are common in older or more traditional homes.

Some doors have odd widths, usually due to where they are placed being limited by their surroundings, such as a staircase or a wall. You may not realise this until you try to move a piece of furniture through the door and realise it won’t fit through easily, even if it fits through other doorways in your home!

But there are some restrictions on door sizes…

Part M building regulations for wheelchair access

Depending on if your property is subject to Part M building regulations, there may also be legally-binding minimum sizes required, to allow for mobility access.

Fire door sizes

Most UK standard-sized doors will also be suitable for use as fire doors, but often with one key difference. The minimum thickness should be 45mm, due to additional materials required for the door to achieve an adequate fire rating.


If you’re in Scotland, then door sizes to differ slightly to the rest of the UK.

What’s called “metric door sizes” is increasingly common. This means that the standard door height in Scotland sits at 2040mm, whilst the thickness should be 40mm.

Measuring a door

When it comes to standard door sizes – measuring is key! If you’re out shopping for new interior or exterior doors then make sure you take dimensions into account before making your purchase. It’s advisable that these measurements are checked by a professional door installer beforehand too, just in case there are any issues which need sorting out early on rather than having problems further down the line!

When it comes to door sizes, the UK has a wide variety of options. If you’re looking for a new front or back door and want one that will fit your home perfectly, make sure you get an installer near you to measure up first.

You can use our online tool to find a door installer near you, who will be able to provide the best advice on the size of door you require, and even come around to your home to measure for you.

Frequently Asked Questions

What is the standard door size in the UK?

The most common door size in the UK is 2’6” (1981 x 762 x 35mm)

Do doors have to be a different size to comply with Part M Building Regulations?

Under Part M Building Regulations, it is important for doors to be suitable for wheelchair users. It is therefore important to consult Part M before installing a new door.