A standard 2 car garage is 24 ft x 24 ft. So you would double that for a four car garage.
What is average size of two car garage?
The average with of an one car garage is 12 feet. Many people will want a few extra feet of width for storage.
20 feet
Average, 24' + 30'
on average 600 sf
16 by 7
The average length would be 24' but bigger is always better.
Normal width of a single car garage is 8' feet. Normal width of a double car garage is 16' feet. These answers are for doors typically found in the USA.
The average cost to build a garage in New York State varies based on the size of the garage. A 1 car garage costs $40 per square feet to build. A 2 car garage costs $85 per square feet to build.
Most are mot big enough and most are around 24x22. A much better size for a 2 car garage is 30x28.
The average two car garage measures 24 feet by 24 feet. Some are larger, but very few would be much smaller.
Tandem would be one in front of the other. I have a four car garage it is 24X60. Two cars wide (24ft) by 2 cars deep (60ft).