Garage Door Sizes in Australia: A Guide for Illawarra Homes

Garage door sizes in Australia follow a set of common widths and heights, but plenty of Illawarra garages don't match them. That's usually the moment people find out: the new dual cab ute only just fits, or the replacement door turns out to be a little too narrow for the opening. At LT Doors, the family-owned garage door business based in Bellambi, we measure and fit doors across Wollongong, Thirroul, Corrimal, Dapto and Shellharbour every week. This guide covers the common door sizes, what to look out for in older homes, and how to make sure the door you order suits your opening, your car and how you use the garage.

Key Takeaways

Garage door sizes in Australia fall into three broad groups: single, double and taller doors for bigger vehicles. Here's the short version before you start comparing doors.

• A common single garage door is around 2400mm wide by 2100mm high. Widths often step up towards 3000mm where the opening allows.
• A common double garage door starts at around 4800mm wide, with wider options towards 5400mm. Heights are similar to single doors, and many products also come in a taller 2400mm option.
• A "standard size" is really a set of common factory sizes, not one fixed measurement. Older Illawarra homes often have openings that don't match the catalogue.
• Roller doors, sectional doors and tilt doors each need different amounts of headroom, side room and clearance around the opening.
• Measure the opening yourself for planning, then get a professional to measure again before anything is ordered.

What Is a "Standard" Garage Door Size in Australia?

There isn't one standard garage door size in Australia. Manufacturers such as B&D, Gliderol, Danmar and Signature Garage Doors make doors in a series of common widths and heights. The one we fit most often is a single door around 2400mm wide by 2100mm high, but that's only where the range starts.

Single door widths usually run from about 2400mm to 3000mm. Double doors usually start around 4800mm and go up towards 5400mm. Height is most often around 2100mm, and many products come in a taller option of around 2400mm for extra clearance.

The finished door isn't quite the same size as the brick or timber opening, because the guides, tracks and weather seals sit around it. That's why we talk about opening width and opening height rather than panel sizes. LT Doors regularly replaces older doors that don't match modern catalogue sizes in Bellambi, Woonona, Figtree and across Wollongong. We match the new door to the opening you already have.

Typical Single Garage Door Sizes

A single garage door is sized for one vehicle, and in most Australian homes it's around 2400mm wide by 2100mm high. These are the common size steps we see on single garages around Wollongong:

• Width: roughly 2400mm, 2700mm and 3000mm, depending on the product and the opening
• Height: around 2100mm as the everyday option, with around 2400mm where extra clearance is needed

Plenty of brick homes around the Illawarra built between the 1970s and 1990s have single doors at the narrow end of that range. A family sedan fits without drama, but a dual cab ute with the mirrors out can feel very tight. If you hold your breath every time you park, a wider opening in the 2700mm to 3000mm range makes daily life easier and saves your mirrors and door edges.

If the opening can't be widened without structural work, our team can often gain usable width by setting the guide tracks as close to the reveal as the door allows.

Standard Double Garage Door Sizes vs Two Single Doors

A double garage can have one wide door or two single doors with a brick or steel pier between them. Most double doors we install start at around 4800mm wide, with wider options where the structure allows. Which one suits you comes down to looks, how you use the garage and the structure you're working with.

• One double door gives you a wider, more forgiving opening. You only need one opener, and the house looks cleaner from the street.
• Two single doors open independently, each door is lighter, and the pier between them may be doing structural work.

Keep in mind that a large double door is heavier, so the springs, hardware and motor all need to suit it. LT Doors sorts this out during the on-site quote, so the door, opener and structure work together. If your garage has an old pier you'd like gone, our centre pier customer story shows what that change looks like in real life.

Roller Doors, Sectional and Tilt Doors: How Size Affects Your Choice

The door type you can use depends on the space around the opening as well as the opening itself. Here's how each type uses that space.

• Roller doors: The door curtain rolls around a barrel above the opening, so roller doors need headroom for the barrel and a little side room each side for the brackets and guides. They're a good fit where the ceiling inside is low but there's room above the lintel.
• Sectional doors: Sectional doors run up and back along tracks under the ceiling. They need clearance above the opening and enough depth back into the garage for the tracks and any motor rail.
• Tilt doors: A tilt door swings out before it lifts, so it needs clear space in front of the opening. On short Illawarra driveways, or where the garage sits close to the footpath, that swing can be a problem.

The exact clearances vary between products and brands, which is why we check headroom, side room and depth on site before we recommend anything. For a broader look at how each type works, see our guide to garage door types explained.

How to Measure Your Garage Opening for a New Door

You can measure your garage opening yourself with a tape measure, working in millimetres. It's worth doing for budgeting and planning, but LT Doors always measures again before ordering, because a few millimetres can make a real difference.

• Width: Measure from one side of the opening to the other, brick to brick or frame to frame, at the top, middle and bottom. Walls aren't always straight, so use the smallest of the three.
• Height: Measure from the finished floor to the underside of the lintel on both the left and right sides. If the floor slopes, the shorter measurement is your working height.
• Headroom: Measure from the top of the opening to the ceiling or the lowest obstruction, such as a beam, pipe or light fitting.
• Side room and depth: Note the space between each side of the opening and the nearest wall, and how far back the garage runs before shelving or storage.
• Safety: Don't loosen or remove springs, drums or cables on an existing door. Measure around the old door and leave the removal to a technician.

When Your Opening Is a Non-Standard or Custom Size

Non-standard openings are common in the Illawarra, especially in homes built before the 1990s, older sheds and garages under the house. If your opening doesn't match catalogue sizes, a door can usually be made to suit it, within the limits of the door type and brand.

LT Doors supplies B&D, Signature Garage Doors, Danmar and Gliderol doors. Common odd sizes we see include low openings under balconies, extra-wide shed openings on bigger blocks, and single openings that sit between the usual size steps.

Sometimes a bit of minor work, like packing out the opening or trimming back cladding, lets you use a common size instead. Anything involving a lintel or other structural part needs a builder's advice and any required council approval first. If you'd like a particular look or an unusual size, see our page on custom garage doors in Wollongong, or read why custom-size garage doors might be the perfect fit.

Choosing the Right Door Size for Your Vehicle and Lifestyle

Size the door for the vehicle you drive now and the one you might buy next. Measure the vehicle's full width with the mirrors out and its full height with roof racks, surfboards, ladders or a rooftop tent on board. Then leave enough room to get in and out comfortably.

• A dual cab ute with surf racks is the classic tight fit on a single door in Thirroul or Bulli.
• An SUV with child seats and a pram needs room to open the doors fully once it's inside.
• If a small car shares the space with bikes, kayaks and shelving along the walls, every bit of side room counts.

If the structure allows it, going wider or taller now is usually easier than changing the opening later. And if the garage doubles as a workshop or storage area, allow for that before you settle on a size.

What to Expect from an LT Doors Measure and Quote

LT Doors offers free on-site quotes at a fixed price, so the price we quote is the price you pay. We're family-owned and based in Bellambi, and we look after homeowners right across the Illawarra.

During the visit, one of our licensed technicians will:

• Measure the opening in millimetres and check headroom, side room, depth and floor level
• Confirm whether a common size will fit or you need a custom door
• Talk through roller, sectional and tilt options for your garage
• Recommend a suitable opener if you want an automatic door

Every installation complies with Australian Standard AS/NZS 4505 and comes with a written workmanship guarantee. To book a free measure and quote, give us a call on 02 4283 4316.

FAQs About Garage Door Sizes

Can I make my existing garage door opening taller?

Making an opening taller usually means raising or replacing the lintel, which is structural work. A builder or engineer needs to look at it first, and you may need council approval. Once the new opening is confirmed, we can size and install a door to suit it.

How much headroom do I need above the opening?

Headroom depends on the door type and the product. Roller doors need space above the opening for the barrel, and sectional doors need clearance for their tracks and motor rail. Because the figures vary between brands, we check headroom on site before recommending a door.

Do I have to replace my motor when I change door size?

Not always. Openers are matched to the door's weight and type, so a much bigger or heavier door, or a change from a roller door to a sectional door, usually needs a new motor. We can test your existing motor during the measure and tell you whether it's worth keeping.

What size garage door do I need for a dual cab ute with racks?

Once racks or a tray are fitted, many dual cab utes are too tall for a single door around 2100mm high to feel comfortable. A taller door of around 2400mm, plus as much width as the structure allows, is a sensible place to start. Bring your vehicle's measurements to the quote and we'll work it out with you.

How do I know if I need a custom size instead of a standard door?

If your measured width or height doesn't sit close to the common sizes, or pipes, beams or a low ceiling get in the way, a custom door is usually the answer. Call LT Doors on 02 4283 4316 and we'll confirm standard or custom during a free on-site measure anywhere in the Illawarra.