For most private buyers sheltering one everyday car, a single carport sized around the vehicle plus door-swing and walk-around clearance is the sensible starting point — but the number that actually decides fit is not the footprint on the brochure. It is the clear internal width between posts and the clear height at the lowest point of the roof. Confirm those two figures against your own vehicle before you compare anything else, because a carport that looks generous in a photo can still leave a door unable to open.
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Start with the Vehicle, Not the Label
"Single" and "double" describe how many cars a structure is intended to shelter, not a fixed set of dimensions. Suppliers vary, and the same label can cover different post spacings and roof profiles. Work from your vehicle's actual width including mirrors, its height, and how much room you need to open a door and walk past. Add clearance for anything stored along the sides — bins, bikes, a workbench.
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Two buyers asking for a "single car carport" can need very different structures: one parks a compact hatchback and wants a tight footprint against a boundary; another drives a tall van and needs headroom more than width. Treat the label as a category, then specify the numbers.
Single, Double and "2 Car" — What the Terms Usually Mean
In practice, "double carport" and "2 car carport" are generally used interchangeably to mean a structure intended for two vehicles side by side. The distinction that matters is whether the two bays are open to each other or separated by a central post, because a central post changes how easily each car can be driven in and how far a door can swing.
A single carport is the lower-cost, lower-footprint option and suits one vehicle with modest side clearance. A two-bay structure costs more in materials and ground area but gives each car its own approach. If you regularly park two cars and both drivers need to get out comfortably, the two-bay layout is usually the more practical choice — provided your site has the width for it.
Specifications That Control Fit
These are the figures to pin down with the supplier before ordering. Ask for them in writing, ideally on a dimensioned drawing.
- Clear internal width between posts at ground level — not the outer roof span.
- Clear height at the lowest roof point, and whether that is at the post or mid-span.
- Post positions and footing requirements, since these set the usable parking envelope.
- Roof overhang and drainage direction, which affect where water lands and how close you can park to a wall.
- Entry and exit approach — the turning space in front of the bays, which the carport itself cannot fix.
A Quick Comparison of the Two Layouts
| Layout | Best for | Main trade-off |
|---|---|---|
| Single | One car, tight site | Less side clearance |
| Two-bay | Two cars, daily use | More width and cost |
The table is deliberately short because the real numbers come from your vehicle and your site, not from a generic category.
Where Carports Go Wrong
The most common failure is ordering on outer dimensions and discovering the clear opening is smaller once posts and framing are counted. The second is ignoring door-swing space: a car fits, but nobody can get out without squeezing. A third is ground conditions — a structure needs stable, level footing, and the supplier should tell you what base preparation the design assumes.
Roof profile matters too. A shallow pitch may shed water poorly in heavy rain, and an overhang that looks neat can direct runoff onto a path or neighbour's boundary. Ask how the roof drains and where.
What to Confirm before You Order
- Send the supplier your vehicle's width including mirrors and its height.
- Request a dimensioned drawing showing clear width and clear height.
- Confirm footing and base preparation requirements.
- Ask what the quoted structure includes — fixings, roofing, delivery.
- Check any local planning or boundary rules that apply to your site.
Buyer Questions
Is a Double Carport the Same as a 2 Car Carport?
Usually yes — both describe a structure intended for two vehicles side by side. Confirm whether a central post separates the bays, as this affects door clearance.
Can I Size a Carport from the Car's Length Alone?
No. Clear width between posts and clear height at the lowest roof point decide whether the car fits and whether doors open. Length alone tells you little about usable space.
Before you commit, ask the supplier for a dimensioned drawing and check the clear opening against your own vehicle with a tape measure on site. That single step prevents most sizing mistakes.
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