Our steel garage kits are customizable and prefabricated, which means they can be tailored to meet your specific needs. Secondly, due to the column-free interior, you can make use of the entire space your garage provides. With that in mind, the right garage size for you depends on your needs. For general storage purposes, 20×24 should be fine. If you need enough space to store two cars, 24×32 would be a better option.