12 x 40
There aren't any standard dimensions for a 1.5 car garage, but a one-car garage is less than 300 square feet. A two-car garage is usually just over 600 square feet, so a 1.5 car garage would be somewhere in between the two measurements.
It would depend on the size of the one car garage and garage door opening.It depends on the size of the garage. Not all one car garages are the same size.
What is average size of two car garage?
The standard width of a double car garage is 20.5 feet. That is a big enough size to fit a large sedan and a truck inside.
The standard garage door height is 7 feet (2.1 meters).
A standard 2 car garage is 24 ft x 24 ft. So you would double that for a four car garage.
32" is typical.
According to the DIY Network a 3 car garage is about 950 sq. ft.
Average, 24' + 30'
16 by 7
It varies on what size car you plan on putting in it.