Expert 3 Car Portable Garage : Great Tips On How To Prepare It. Shelterlogic 10 by 15 by 8 foot metal frame instant garage. Triple garages from 9m in width.
The size of a three garage can range from 20’x30′ to 30’x60′ but keep in mind that going with the smallest size will limit space for storing other things. Best portable garage for durability. Measures in at just 10’ x 10’, without a lot of extra room for anything more than a single car, crossover, or compact suv.