Average Double Carport Size. The length of a double car garage is the same as the minimum garage size. Carport average costs the actual cost of a carport can vary significantly based on design, materials, local costs, installation, etc.
One other way is to get more space is to go with a longer size carport. This will fit two cars in this space with the ability to easily open the doors and not worry about hitting the wall. While more unusual, it is possible to construct a carport to hold four cars.
So a double carport standard size is about double the width of a single carport.
1 unit = 2 x 450mm wide @ 1m increments 2, 4 or 6 panes: Standard carport size in meters. In some areas, such as san diego, california, the size of a carport is restricted to less than 1,000 square feet. 300mm passengers side allowance plus 1.8m car plus 800mm door plus 1.8m car plus 800m door gives a minimum width of 5.5m.