Is a 20×20 garage big enough?
Most experts say the minimum recommended dimensions for a two-car garage is 20×20. This size two car garage will give space for two smaller vehicles. You won’t have much space for storing extra knick-knacks, but it should get the cars inside.
A common two car garage size is 24×24. This size gives you ample room for parking a car or SUV with a little room left over for storage. A 20×20 two car garage is sufficiently large enough to park two vehicles, but you won’t have much extra room for storage.