Pre-built garages can also be referred to as portable garages and pre-fabricated garages. Whatever you choose to call them, they are a separate building from your house and people use them for many things other than just parking their cars in them.
If you are trying to figure out different garage ideas and whether a pre built garage is for you, it is wise to first figure out where you want it and do some research. Many cities will require you to get a permit to build anything additional to your house or on your property. You don't want to find out, after it is built, that you needed a permit because that would inevitably involve fines as well.
You should also consider the lay of the land as you don't want to build anything on a slope. If the only area available is not level, you will have to hire someone to level the land so that the structure can be sturdy once it is up. Your local climate may also influence the type of garage you want to get because some are better in wind and snow than others.
Depending on what your needs are for the prebuilt garage, you will need to choose between the different types available. For instance, if you are going to use your new prebuilt garage to store farm equipment or other such things that need to be wheeled in and out, you might decide on a different structure than if you only want it for addition storage. No matter what type of prebuilt garage you ultimately choose, it will not be as sturdy as a real building that has been built like your house.
In order to get the warranty or guarantee, you might be required to have a professional install it. This would be advisable for anyone that is not used to a prject of this size. You might even decide to get concrete for the floor of your pre built garage and that is an added cost and complication. Professionals are always a good choice if you have any doubts about having it installed correctly.