Standard Door Sizes UK – A Complete Guide by NexGlazing
When choosing new doors for your home with standard door size UK, whether it’s internal doors with glass, French doors, or solid white internal doors, understanding the correct door size is essential. From improving accessibility to ensuring a perfect fit, door sizing plays a key role in both functionality and aesthetics.
In this guide, NexGlazing breaks down everything you need to know about standard door sizes in the UK, including internal, external, and bespoke options.
Internal Door Options for Every Home
Before diving into sizes, it’s worth exploring the popular styles available in the UK:
Internal glass doors UK – Perfect for letting natural light flow between rooms
Wooden doors with glass – A classic blend of warmth and elegance
Cheap internal doors – Budget-friendly solutions without compromising on style
Folding internal doors – Ideal for saving space in smaller homes
Half glazed internal doors – A balance of privacy and brightness
Solid white internal doors – Minimalist and modern choice
Each of these door types can be manufactured in standard or bespoke sizes to suit your space.
Are There Standard Door Sizes in the UK?
There isn’t a single universal door size in the UK. However, there are commonly used standard sizes that most manufacturers follow.
Many homes—especially older properties—may require custom or made-to-measure doors, while new builds must comply with building regulations for accessibility.
Standard Internal Door Sizes UK
The most common internal door height in England and Wales is:
Common Internal Door Widths:
762mm (30”) – Most common
In Scotland, slightly different sizes are often used, particularly narrower widths like 726mm.
Standard External (Front) Door Sizes UK
For front doors, building regulations play a major role.
Minimum clear opening width: 775mm
Designed to ensure accessibility for all users
Most standard front doors also follow a height of 1981mm, although taller options are becoming more popular in modern homes.
Fire doors are thicker than regular doors to provide protection in case of fire:
44mm thickness (FD30) – 30 minutes fire resistance
54mm thickness (FD60) – 60 minutes fire resistance
These are essential for safety in both residential and commercial properties.
Standard Patio, Bifold & French Door Sizes
Width range: 1180mm to 4800mm
• 2-panel: 1800mm wide
• Up to 7-panel: 6420mm wide
• Max panel width: 1200mm
3-Internal & External French Doors:
Standard widths:
• 1200mm
• 1500mm
• 1800mm
With sidelights: up to 3000mm wide
These options are ideal for creating open-plan living spaces or connecting indoor and outdoor areas.
How to Measure a Door Correctly?
To ensure the perfect fit, follow these key measuring tips:
Measure from inside the property
Measure width horizontally (brick to brick or reveal to reveal)
Measure height vertically from top (head) to bottom
Include the door cill if it is part of the frame
Exclude it if it’s separate
Accurate measurements are crucial, especially when ordering bespoke doors.
Do You Need a Bespoke Door Size?
Not all homes fit standard dimensions. Older properties, unique layouts, or modern design preferences may require made-to-measure doors.
At NexGlazing, we offer fully customised solutions for:
Aluminium and glass doors
Choosing the right door size isn’t just about measurements—it’s about creating a seamless fit that enhances your home’s style, comfort, and functionality.
Whether you’re installing internal glass doors, upgrading to folding internal doors, or selecting cheap internal doors for a renovation, understanding UK standard sizes will help you make the right decision.
Condensation might seem harmless, but it can lead to bigger issues like mould and damage over time—our next blog, How To Stop Condensation On Your Windows, explains how to tackle it head-on with practical tips you can apply right away, so be sure to read it and stay one step ahead of the problem.
Do You Have Any Questions? We’ll Be Happy To Assist!
