The standard two-car garage is 18×20. This doesn't give you as much room to walk around as a one-car garage does. But it is plenty big enough for two standard cars, though large trucks will struggle with enough room.
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4.8m, the average width for two cars, is also the recommended minimum length for residential driveways in the UK. Driveway widths and lengths are not a free for all as there are local council regulations which have to be adhered to plus, permitted widths can be affected by any abutting features like a fence or walls.
2. Two Car Garage. The ideal car park size at home if used for two cars is usually a square measuring 6 x 6 meters or 6.5 x 6.5 meters. This size is enough to accommodate two cars at once without worrying about the cars bumping or scratching each other.