When searching for a new garage door, you’re often hit with a span of metric and imperial measurements, and left wondering what are standard garage door sizes? The terms single and double are also frequently used to describe garage door sizes in the UK, so how do you know which size to choose?
Haus Installations provides replacement garage doors across the West Midlands measuring standard and bespoke sizes, and this guide will detail how wide garage doors are, the variations and limitations of size based on the door type.
Why Garage Door Size Matters
Getting the right sized garage door is important for vehicle access and storage efficiency. As modern cars have wider and taller dimensions, a door that’s too narrow or low can make daily parking stressful, limit the type of vehicles you can own, and reduce usable space for storage, bikes or workshop areas.
There are also safety and structural considerations. Oversized doors can compromise the structural integrity of the garage if the surrounding walls and header aren’t properly reinforced. On the other hand, undersized doors increase the risk of vehicle damage and awkward manoeuvring. Correct sizing ensures smooth operation, proper load distribution and long-term durability.
Garage door size in the UK also has important planning and design implications. The door must fit precisely within the existing garage opening dimensions, comply with local building codes and align with the garage’s internal layout. Thoughtful planning at this stage helps avoid costly modifications later and ensures the door works seamlessly with the overall design of the home.
Standard Garage Door Sizes in the UK
When we use ‘standard size’ for garage doors, it refers to imperial measurements with a rounded up size. Up and over garage doors are often manufactured to fit a set of commonly used opening sizes, which keeps costs down and simplifies installation. However, these standard garage door sizes don’t account for features like the operating mechanism and subframe.
- Standard single garage doors – designed for most standard cars and widely available across door styles and materials.
- 7’ (width) x 6’6”-7’ (height)
- Standard double garage doors – ideal for two vehicles or a single wide access point.
- 14’-16’ (width) x 7’ (height)
Of course, variations do exist. Older properties may have non-standard openings, while modern homes and new builds often opt for wider or taller doors to suit SUVs and electric vehicles.
Made to measure garage doors are also common in the UK, allowing homeowners to adapt to unusual openings or design preferences without major structural alterations.
Maximum Practical Garage Door Widths
Many homeowners want to go as wide as possible with their garage doors, but there are limits. As width increases, the door becomes heavier and more prone to flexing, which can affect smooth operation and long-term reliability.
Material strength and overall weight also affect what size is suitable. Wider doors require stronger frames, reinforced panels and more powerful motors, if the door is automated. A single door can become impractical as the width increases, which is why many wider garage doors are fitted with two doors or a sectional system.
Material Limitations
Different materials have a big impact on size options and performance of garage doors. As door width increases, durability and weight constraints become more critical. Heavier materials mean extra strain on tracks, hinges and motors, which can lead to increased wear and the likelihood of mechanical issues.
Larger doors will require more frequent checks and adjustments, as components are under greater stress, and even small misalignments can affect operation. Choosing the right material for the desired width helps reduce maintenance demands and extends the door’s lifespan. Here are a few common materials used for garage doors in the UK:
- Steel and aluminium – popular for wider doors because of their enhanced strength-to-weight ratios. Aluminium, in particular, is lightweight and resistant to corrosion, making it suitable for larger door widths.
- Timber – visually appealing but heavy and prone to warping over time. This limits their maximum practical width unless they feature significant reinforcement.
- GRP (glass-reinforced plastic) – very lightweight but often lacks the rigidity needed for very wide openings.
Opening Mechanism Limitations
The opening mechanism, or type of garage door, has a direct impact on the maximum feasible width and height. Different door styles open and operate in different ways, and therefore have their own practical limits.
Up and over garage doors operate as a single solid panel that tilts outward and then slides back into the garage. This design places more stress on the frame and lifting arms as the door gets wider, meaning it has a more limited maximum width compared to other styles. If an up and over door is very wide, issues like flexing, uneven lifting and reduced reliability are common, unless significant reinforcement is added. Up and over garage doors will feature standard single sizes, and are one of the most popular types found across the UK.
Roller garage doors open vertically, rolling into a compact box above the opening. Because the curtain is made of narrow slats and supported by side guides, roller doors can accommodate relatively wide openings without needing internal tracks. However, similar to other door types, the wider the door, the heavier it becomes. There is also a height consideration; sufficient headroom is needed to house the roller box, especially for taller doors.
For larger-than-average garage door sizes in the UK, reinforced mechanisms are recommended. These may include heavier-duty springs, twin motors, strengthened guide rails and upgraded fixing to ensure safe and smooth operation.
Planning and Installation Considerations
While you likely won’t need to apply for planning permission for a new garage door installation, if any structural changes are needed for very wide or tall garage doors, building regulations may apply.
Adequate structural support, including reinforced frames and lintels, is essential to safely carry the load of the door and prevent long-term movement or cracking.
It’s crucial to accurately measure your garage door opening. Rather than measuring the door, you must measure the width and height of the structural opening, i.e. from brick to brick. The space above the opening, called the headroom, and the space on each side should also be measured. To ensure the door can open without obstruction, measure the internal depth of the garage.
When Bespoke Solutions Are Needed
If you are ever unsure about what and where to measure, professional installation is strongly recommended. At Haus Installations, we provide accurate measurements for clients for every garage door replacement. Our experience ensures the precise fit for homes that have:
- Non-standard or very wide openings
- Automated doors needing electrical connections
- Older garages with questionable structural integrity
- Doors that need reinforced mechanisms or bespoke sizing
Our professional installers can assess load requirements, ensure compliance with regulations and fine-tune the door for safe, reliable operation.
If you’re looking for a new garage door installation from experts who ensure precise fits, high-quality materials and services that save you time and costs, get in touch with our team at Haus Installations by calling 01905 701201 or request a free quote using our contact form.
