Garage door sizes explained: standard, double and custom options

A new garage door does wonders for a home's façade, but it's about more than just looks. You need your garage door to be functional, reliable and efficient. Whether you're building a new home, managing a renovation project or replacing a door that's reached the end of its lifespan, understanding the range of door sizes available can save you time, money and hassle down the line.

Here's our guide to everything you need to know about garage door sizes, from standard dimensions of single and double-car garage doors to when a custom solution may be the best option for your home.

Why garage door size matters

When you order a new garage door through Steel-Line, we'll always complete a free on-site measure and quote so that you have peace of mind knowing your garage door will fit the garage door opening perfectly. Still, knowing the typical dimensions of a garage door can help you compare quotes and understand exactly what it is that you're paying for.

No matter what type of door you choose whether it's a Tilt Garage Door, Sectional or Roller, the opening needs to be measured for accuracy because every garage is different. These measurements allow us to design and manufacture a garage door that will fit snugly into the space. For example, many garages have a sloped floor. In this case, we can make your garage door with an angled bottom rail, or taper, so that there are no unsightly gaps.

The better the door fits in the garage door frame, the better it will look, and the more value it will add to your property. A poorly sized garage door can make it difficult to park cars comfortably, allow rainwater, dust or pets to get in and can cause high power bills due to inefficiency.

Standard garage door sizes in Australia

Here's a breakdown of the standard garage door sizes in Australia. Keep in mind that after installation, the useable opening may be smaller, so leave plenty of room for your vehicle.

Standard garage door width

A standard single garage door is typically 2400mm wide, which suits most small to medium-sized vehicles. A double garage door usually measures 4800mm wide, providing ample space for two cars or one larger vehicle.

Keep in mind that in Australia, the average-sized car is approximately 1900mm wide and allowing extra space on either side is essential for comfort.

Standard garage door height

The standard height of both single and double doors on a garage is generally 2100mm. However, if you drive a taller vehicle or plan to install overhead storage, you may need a taller door.

Headroom, the space between the garage opening and the ceiling, is another important factor. For example, a Roller Door typically requires between 350mm and 450mm of headroom space for the rolled-up curtain to sit when open. A garage space with a lower ceiling may better suit a Tilt Door.

Standard garage door depth

The thickness of a garage door ranges between 30mm and 51mm, depending on the type of door and whether it has insulation. Insulated doors tend to be thicker and offer better energy efficiency.

The most common garage door sizes

Single garage door sizes

Single garage doors are typically 2100mm high and 2400mm wide, which is large enough to fit cars and small SUVs comfortably.

There is some flexibility when it comes to size to make it easier to choose the right size garage door for your space. For example, Steel-Line's Tilt Garage Doors can be manufactured up to 5500mm wide and 2400mm high and Roller Garage Doors up to 5500mm wide and 3000mm high. Anything outside these dimensions will require a custom design.

Double garage door sizes

A standard double garage door measures 2100mm high and 4800mm wide, which is ideal for parking two cars side by side or for accommodating wider vehicles.

You can choose one large door or two single doors, depending on how your garage is constructed and how wide your vehicles are. Two single doors require two automatic openers, so they can be more expensive to install than one large double door.

Custom garage door options

If the right garage door size can't be found in the standard range, you can have Steel-Line manufacture a custom-sized garage door for your exact specifications.

Whether you're parking a taller truck, storing a boat or building a workshop, we offer tailored solutions, all designed to meet local building regulations.

Factors to consider when choosing your garage door size

When picking the perfect garage door size, there are some key things you need to consider:

• Your vehicle dimensions and whether you plan on investing in a larger vehicle
• The number of cars you need to park in your garage
• Garage uses. For example, do you require roof storage space?
• Building codes that limit the size of your garage door
• Headroom for the garage door and its components
• The angle of your driveway
• The pitch of your roof. You may require a pitched track system to follow the roof's slope.

How to measure your space

1. Use a tape measure to determine the width of your garage opening by measuring the top, middle and bottom. This will help you determine if your opening is the same width at the top and the bottom.
2. Next, measure from the floor to the header to find your garage door height. Remember that the garage door itself, especially if it's a Roller Door or Sectional Door, and its components will require space to operate.
3. As well as checking the headroom, you'll need to assess the amount of room at each side of the doorway to ensure there is enough room for the tracks to run.
4. Note any obstructions on the garage ceiling, like storage racks or lights, that may interfere with the installation and operation of your new door.
5. If you're choosing a Sectional Garage Door, measure the length of your garage to ensure there is enough space for its smooth operation.

Once you have an idea of the size of your garage opening, it can make choosing a garage door type easier and give you a rough idea of the cost of a suitable door for your space.

Please remember we do not have a stock stared size for our garage doors. All doors are made to order to ensure they fit your space correctly. For more information contact our team today!

Ready to order your new garage door?

An ill-fitting garage door not only looks bad, it doesn't function well, either. When you buy a garage door from Steel-Line, a trusted Australian brand, we'll come to your home or business and measure your space to ensure your garage door fits perfectly.

Visit our website to organise a free measure and quote today.

Frequently Asked Questions

What types of garage doors are available?

There are many different types of garage doors, including Roller Doors, Sectional Doors and Tilt Doors. Each type is available in different sizes to suit the specific dimensions of your garage opening.

What are the standard sizes for garage doors?

Both single and double garages are normally 2.1m high. A single garage door is 2.4m wide, while double garage doors are typically 4.8m wide.

What size are garage doors in Australia?

In Australia, garage doors are often made to measure. This makes it easier to fit a garage door that suits your opening size perfectly.

How much bigger should a garage door be than the opening?

Depending on the door type a garage door can be either smaller or larger than the opening.

Can I replace a single door with a double?

It may be possible to replace a single door with a double garage door if your garage is large enough, but it would require structural modifications.

Replacing two single doors with one may be possible but typically involves removing the centre pillar and other structural modifications.

Are there standard height options?

The standard height of both single and double garage doors is in the range from 2.1m to 2.4m.

What if I have sloping ground or an uneven opening?

A sloping floor is very common in garages. Companies like Steel-Line can overcome this problem by manufacturing your garage door with an angled bottom rail, or taper, to ensure a secure fit.