Internal doors are an essential part of any building’s architecture. They provide privacy, and security, and even add aesthetic appeal to the property. Door sizes are an important consideration when installing new internal doors or replacing old ones. In this blog, we will discuss the various internal door sizes available and what factors to consider when choosing the right size for your home or building.

Standard Internal Door Sizes

The most common standard internal door sizes in the UK are 762mm (30 inches) and 838mm (33 inches) wide. These sizes are the most readily available and widely used in most homes and commercial buildings. The height of standard doors is usually 1981mm (78 inches), but some doors may be taller or shorter depending on the specific requirements of the building.

Factors to Consider When Choosing Internal Door Sizes

When choosing internal door sizes, several factors must be considered. The following are some of the most important factors to consider when selecting the right size for your building:

  1. The Size of the Room 

The size of the room where the door will be installed is an important consideration when choosing the door size. Larger rooms may require wider doors, while smaller rooms may require narrower ones to save space.

  1. The Function of the Room

The function of the room is also an important consideration. For example, a door leading to a bathroom may require a smaller size to provide more privacy, while a door leading to a large living room may require a wider size to accommodate more people.

  1. Accessibility

Accessibility is another important factor to consider when choosing internal door sizes. Doors leading to bedrooms, bathrooms, and other spaces that require privacy may require wider doors to accommodate wheelchairs and other mobility aids.

  1. Aesthetics

The aesthetic appeal of the door is also an important consideration. The size of the door should complement the overall design of the building, adding to its overall aesthetic appeal.

Custom Door Sizes

In some cases, standard door sizes may not be suitable for your building. Custom door sizes may be required to fit specific requirements. Custom doors are made to order and can be designed to fit any size and shape, making them a great option for unique and unconventional spaces. If you require a non-standard size, fill out our form with your requirements and we will get back to you, please visit our page: Made To Order, Bespoke Doors


Internal door sizes are an important consideration when installing or replacing doors in a building. Standard door sizes of 762mm and 838mm are the most commonly used sizes in the UK, but custom sizes may be required for unique spaces. Factors such as the size of the room, the function of the room, accessibility, and aesthetics must be considered when choosing the right door size for your building. Ultimately, the door size you choose should be functional, aesthetically pleasing, and complement the overall design of the building.

Internal Door Sizes Chart





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