Question: what is the average size of a double car garage in meters?
Answer: Standard Single and Double Garage Dimensions As a guide, a standard double garage dimension should be 6m x 6m with a door size of 5.2m. A standard single garage is around 3.6m x 6m with a door size of 2.6m wide. This will allow your cars to fit in comfortably and is a decent size for the majority of cars.