A guide to standard door sizes

UK Home Improvement

A Guide To Standard Door Sizes

Your home’s doors are one of its most important elements. 

Take your front door, for instance.

As well as enhancing your property’s exterior, it also acts as a secure and private barrier between your home and the outside world. Plus, as it can boost the aesthetics of a property, it can even add to its kerb appeal and sometimes even its overall value.

And then there are the internal doors inside a house.

Helping to neatly compartmentalise every room into its own individual space, they help a house to flow and personalise the interior. 

With all this considered, being aware of standard door sizes can be helpful when it comes to choosing new doors for your property, and in this article, we’ll examine the most common sizes for every type of door within a house. 

Read on to find out more.

Standard Door Sizes

Every property is different, so there is no one standard size for any type of door. 

However, most door companies will be able to provide you with a rough sizing guide that outlines the common sizes for different door types. 

In the section below, we’ll examine the average door sizes you can expect for the different areas of a property, but be aware that the individual dimensions of your specific home may differ due to its unique style and size. 

Internal Door Sizes 

Let’s start with internal door sizes. 

Internal doors refer to all of the doors inside the property be it the doors to the different rooms or cupboards in the house. With this in mind, the standard internal door size will vary from house to house but some of the most common ones are listed below.

1981 x 762 x 35mm: This is the most common internal door size in the UK and it is also sometimes referred to as a 2’6’’ door. Almost every door company in the country will likely have internal doors of this size available, but remember you should first properly measure the space you’re working with to ensure it will fit in your home.

1981 x 610/686 x 35mm: If you live in a house that is smaller or has restricted space, then you will need internal doors that are suitably sized. Internal doors with dimensions of 1981 x 610/686 x 35mm are typically selected in these instances. 

1981 x 838 x 35mm: If your household has a wheelchair user or someone with mobility issues residing in it, then you will need to account for this when installing doors in the property. Typically, people with such issues will need more door space when moving around the house, and doors sized 1981 x 838 x 35mm tend to be the most appropriate size in these circumstances. 

1981 x 457/533 x 35mm: If you have walk-in cupboards or wardrobes in the home to store clothes and objects, then this is the ideal size. 

Metric (mm)Imperial (Inches)Imperial (Feet & Inches)
1981 x 457 x 3578” x 18” x 1.4”6’6” x 1’6”
1981 x 533 x 3578” x 21” x 1.4”6’6” x 1’9”
1981 x 610 x 3578” x 24” x 1.4”6’6” x 2’
1981 x 686 x 3578” x 27” x 1.4”6’6” x 2’3”
1981 x 762 x 3578” x 30” x 1.4”6’6” x 2’6”
1981 x 838 x 3578” x 33” x 1.4”6’6” x 2’9”

In addition to overall size, you might want to consider the thickness of an internal door. This is especially the case if you only have a small area to work with. 

Standard internal doors will have an average thickness of 35mm – 40mm. However, if you want to install fire doors (this is more likely if you’re seeking internal doors for a commercial property) then they have an average thickness of 35mm – 54mm. They tend to be thicker as fire doors are required to slow down the spread of a fire.

Furthermore, internal doors in the UK have an average width of 762mm.

External Door Sizes

Now, let’s take a look at external doors.

External doors is an umbrella term that encompasses front doors, garage doors, patio doors and more. 

What Is The Standard Front Door Size?

The standard front door size in the UK tends to be 1981 x 838 x 44mm. However, if your front door does not align with these metrics then there is no need to panic. 

This is because most front door companies are able to tailor their products specifically to the unique requirements of your property. 

Other common front door sizes include:

  • 1981 x 762 x 44mm
  • 2032 x 813 x 44mm
  • 2082 x 864 x 44mm
  • 2134 x 915 x 44mm
Metric (mm)Imperial (Inches)Imperial (Feet & Inches)
1981 x 762 x 4478” x 30”6’6” x 2’6”
1981 x 838 x 4478” x 33”6’6” x 2’9”
2032 x 813 x 4480” x 32”6’8” x 2’8”
2082 x 864 x 4481 1516” x 34”6’9 1516” x 2’ 10”
2134 x 915 x 4484” x 36”7’ x 3’

The thickness of external doors will also vary significantly depending on the type of door you are having installed. On average, the thickness of external doors will be roughly the following:

  • Front doors – 44mm – 54mm thick
  • Fire doors – 44mm – 54mm thick
  • Garage doors – 44mm thick
  • French patio, folding and sliding doors – 44mm – 70mm thick. 

Garage Door Sizes 

Equally as important as your front doors and internal doors are your home’s garage doors. 

As well as the traditional uses of vehicle storage, equipment storage and the storage of other miscellaneous objects, these days garages are often converted for a variety of purposes including home offices, gyms, extra bedrooms and much more. 

With all of this in mind, it’s essential that you have the right kind of garage door in place, as garages often store expensive equipment and objects as well as provide a direct route into your home. This means that having a door that enhances security is paramount. 

Generally, the standard garage door dimensions are as follows:

  • Single garage doors – 7ft (2,134mm) x 7ft (2,134mm)
  • Double garage doors – 14ft (4,267mm) x 7ft (2,134mm) or 16ft (4,877mm) x 7ft (2,134mm). 
Metric (mm)Imperial (Inches)Imperial (Feet & Inches)
2134 x 213484” x 84”7’ x 7’
4267 x 4267168” x 168”14’ x 14’

Again, garage door sizes will vary from garage to garage, and most reputable garage door companies will offer bespoke products that are tailored specifically to the exact dimensions of your property. 

French Door Sizes 

French, or patio, doors are common in many modern properties and are a stylish and practical addition to any home. Typically, these doors are installed in dining rooms or conservatories and lead directly into the garden of a property. 

There isn’t really one standard French door size, instead, they tend to range from a variety of different sizes including:

  • 36’’ x 78’’
  • 46’’ x 78’’
  • 48’’ x 78’’ 
  • 54’’ x 78’’
  • 60’’ x 78’’

If you have a particularly big space to work with, pairing two single French doors is usually the most appropriate option as opposed to trying to source a French door that is significantly large. 

In regards to thickness, internal French doors will usually be 35mm – 40mm thick whereas external French doors will have a thickness of at least 44mm. 

Which Internal Door Is Best For Me? 

In addition to selecting doors of the right size, there are a variety of other factors to consider when choosing internal doors. 

Stylistic factors are bound to be part of the decision making process and there a number of things to think about in this arena. 

First, you’ll need to settle on the style of the door.

There are a whole host of options to choose from. This includes standard doors that open and close in the traditional, conventional way, bi-fold doors (or sliding doors) which open and close in a more elegant manner or even internal French doors. 

No matter what type of door you go for, you will then have to decide whether you want the door to be flush or not. Flush doors are doors that sit in-line with the door frame as opposed to more commonplace options that sit slightly back, or recessed, in the frame. 

Flush doors tend to be cheaper and more convenient. This is because they’re usually more lightweight and therefore easier to open and close. However, they are more difficult to cut down to size so if you’re working with a doorframe that is narrower or shorter than the average size it might be harder to get a flush door to fit. 

Once you know what style of internal door you want, you can go about choosing the material. 

Some of the most popular materials people tend to choose include:

Hardwood: A stylish and aesthetically pleasing choice, hardwood doors are constructed from several pieces of wood that are built onto one robust, central core. These doors are considered to be ideal for high-traffic areas as they’re incredibly durable and therefore more resistant to wear and tear. As well as this, they’re often selected for bedrooms due to the fact that their excessive thickness helps to muffle sound and instils a quieter and more relaxing environment. 

Solid wood: In contrast to the wooden option above, solid wood doors are made from just one piece of wood. They also offer great soundproofing benefits and durability and can also help with insulation. This option is also extremely versatile and is available in a wide range of different tones, decors and styles. They can be a bit more expensive than hardwood but this is due to the fact that they tend to be of a greater quality. 

Moulded doors: One of the most cost-effective choices, if you’re on a budget then moulded doors may be the way to go. They can be made hollow or solid and are made using compressed wood fibres. They are also available in a wide range of designs, and another big benefit is that they are extremely lightweight. 

Glazed doors: Glazed doors feature a glass panel that can help welcome natural light and make a room brighter. They are particularly useful if you are looking to improve a room that is neglected by natural light.  


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