Sectional Garage Door Sizes Standard & Custom UK Dimensions

Your complete guide to UK sectional garage door sizing- standard dimensions, how to measure correctly, and made-to-measure options.

Sectional garage door sizes in the UK are available across a huge range- from around 2000mm wide for compact single openings right up to 5500mm wide for large double garages, with virtually every size in between available as standard. Heights follow a similarly broad range, with the most common options running from 1981mm up to 2286mm.

Getting the right size is the single most important step when buying a sectional garage door online. Order the wrong size and you've got a door that won't fit- and a costly return to deal with. This guide walks you through the standard sectional garage door sizes available in the UK, shows you exactly how to measure your garage opening, and explains what to do if you need a made-to-measure door.

Standard Sectional Garage Door Sizes in the UK

Most UK homes use a fairly predictable range of garage opening sizes, and manufacturers have built their standard ranges around these common dimensions. That said, every garage is different- the tables below show some of the most common sizes, but they are far from exhaustive.

Standard Single Garage Door Sizes

Single garage doors suit an opening for one vehicle. Some of the most commonly ordered single sectional garage door sizes in the UK include:

One of the most widely fitted single garage door sizes in the UK is 2286mm wide x 2134mm tall (7'6" x 7'0"), but there is no single definitive standard- if your opening doesn't appear above, it almost certainly falls within the wider range that is available.

Standard Double Garage Door Sizes

Double garage openings are designed to house two vehicles side by side. Some common double garage door sizes in the UK include:

These are illustrative rather than exhaustive. Sectional garage doors are available in widths from 2000mm all the way up to 5500mm, covering the full range of standard and non-standard UK garage openings.

Leading brands available through Garage Doors Direct include Hormann, Garador, Teckentrup, Wisniowski, and Premier-Line.

How to Measure Your Garage Opening

Before placing an order, you need accurate dimensions- not a guess, and not a measurement taken from your existing door. Follow these steps carefully.

Step 1- Measure the Width

Measure the structural opening, not the existing door or its frame. Take three measurements across the opening - one at the top, one in the middle and one at the base. Use the smallest of the three as your width figure.

Step 2- Measure the Height

Measure from the finished floor level up to the underside of the lintel (the horizontal beam directly above the opening). Take three measurements- left side, centre, and right side- and use the smallest figure. This is your opening height.

Step 3- Check Header Clearance

Sectional doors travel upward in panels before running horizontally along the ceiling. The amount of header clearance required depends on the specific product and how the door is to be fitted. There are two fitting methods:

Fitted behind the opening (most common): The frame is fixed to the wall surrounding the opening. Some header clearance is required above the lintel- typically around 200mm, though this varies by product. If your header clearance is limited, a low-headroom conversion kit may be available.

Fitted within the opening: The frame sits inside the structural aperture itself. With this method, no header clearance above the lintel is required at all- making it a useful solution for garages with very tight headroom.

Step 4- Check Side Room

As with header clearance, side room requirements depend on the fitting method:

Fitted behind the opening: The vertical tracks sit on the wall either side of the opening, requiring a minimum of approximately 100mm of clear, unobstructed wall space on each side.

Fitted within the opening: The tracks sit inside the aperture, so no additional side room is needed beyond the opening itself.

If you are unsure which fitting method suits your garage, get in touch and we can advise.

Step 5- Check Garage Depth

The horizontal track runs back into the garage along the ceiling when the door is open. You need sufficient garage depth from the face of the opening for the track to sit correctly. As a guide:

• Manual operation: approximately 2.5m minimum depth required

• Automatic (motorised) operation: approximately 3.2m minimum depth required (to accommodate the motor unit)

These are approximate figures and can vary slightly depending on the door height and manufacturer. If your garage is on the shallower side, confirm the exact requirement for your chosen door before ordering.

What If My Garage Doesn't Fit a Standard Size?

Not every garage was built to standard dimensions- especially in older properties, converted outbuildings, or self-builds. If your opening doesn't match any of the common sizes listed above, a made-to-measure sectional garage door is the answer.

Garage Doors Direct supplies made-to-measure sectional doors from leading manufacturers including Hormann, Garador, Teckentrup, Wisniowski, and Premier-Line. Simply provide the exact dimensions of your opening and we will source the door to fit. Made-to-measure options are available in steel, insulated, and woodgrained-effect finishes- so you don't have to sacrifice style to get the right size.

Manual or Automatic Operation

All sectional garage doors available through Garage Doors Direct can be specified in either manual or automatic (motorised) operation. An automated door can be added at the point of order or retrofitted later, and works with a range of remote control and smart home systems depending on the manufacturer.

If you are planning for automation, remember to factor in the additional garage depth requirement noted in Step 5 above.

Common Sizing Mistakes to Avoid

Check each of these before you place your order:

• Measuring the old door instead of the opening. Doors shrink, warp, and are sometimes fitted incorrectly. Always measure the structural aperture.

• Overlooking garage depth. Width and height get most of the attention, but insufficient depth is a common installation problem- particularly when adding a motor.

• Not accounting for the fitting method. Whether your door is fitted within or behind the opening affects the headroom and side room you need. Know which method applies before measuring.

• Not checking for floor irregularities. If your garage floor slopes or has a raised threshold, factor this in when measuring the opening height.

• Rounding measurements up. Always work with your exact smallest measurement. Rounding up even 10–20mm can mean a door that won't close flush.

Find Your Size with Garage Doors Direct

Garage Doors Direct offers sectional garage doors across the full range of UK sizes- from compact single openings to wide double garages- with made-to-measure options for any opening that falls outside the norm. Brands available include Hormann, Garador, Teckentrup, Wisniowski, and Premier-Line, in a wide choice of styles, finishes, and insulation levels, with manual or automatic operation available on all models.

If you are unsure about your measurements or which fitting method is right for your garage, get in touch and we will help you find the right door.

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Frequently Asked Questions

What is the standard sectional garage door size in the UK?

There is no single standard size- UK garage openings vary considerably. One of the most commonly ordered single door sizes is 2286mm wide x 2134mm tall (7'6" x 7'0"), and a popular double size is 4877mm wide x 2134mm tall (16'0" x 7'0"). However, sectional doors are available in widths from 2000mm to 5500mm, covering the full range of UK openings.

Can I get a sectional garage door in a non-standard size?

Yes. Garage Doors Direct supplies made-to-measure sectional doors from leading manufacturers. Simply provide your exact opening dimensions and we will source a door built to fit.

How much header clearance does a sectional garage door need?

It depends on the fitting method. Doors fitted behind the opening typically require approximately 200mm of clearance above the lintel, though this varies by product. Doors fitted within the opening require no additional headroom above the lintel at all.

How do I measure my garage door opening correctly?

Measure the structural opening- not the existing door. Take three width measurements (top, middle, bottom) and three height measurements (left, centre, right). Always use the smallest figure for each dimension.

How much side room does a sectional garage door need?

For doors fitted behind the opening, approximately 100mm of clear wall space is needed on each side. For doors fitted within the opening, no additional side room is required.

How much garage depth do I need for a sectional door?

Approximately 2.5m for a manually operated door, or approximately 3.2m if a motor is added. These are indicative figures and may vary slightly depending on the door and manufacturer.

Can I add automation to a sectional garage door?