Metal garages are available in virtually every size and configuration, depending on your intended use of the structure. These garages can range from simple carports to outdoor work sheds to more elaborate buildings. They also range from all-metal structures to metal-framed buildings with soft sides. If you intend to build a metal garage from scrap, obtaining a set of plans is a priority. If you are only assembling a pre-fabricated garage, the kit will include plans.
If you know a friend or colleague who recently had a metal garage built, check with him to see if he still has the building plans. If so, he might not mind copying the plans and providing you with a copy. Even if he spent money on them, the plans are usually obsolete if the structure is built. If you feel badly about asking for the plans for free, offer some sort of trade.
Many builders offer plans for structures such as metal garages, but typically these plans are free only with the caveat that you sign up to have the builder do the work for you. If you plan on hiring a builder for the job, this option can be preferable because you will get the plans for free and a builder who is familiar with the plans. Call builders in your city who specialize in garages and inquire about free plans.
Visit a library in your city to look at building magazines and journals, which often include plans for different building projects. Focus on do-it-yourself magazines that provide in-depth plans and articles about building your own structures. Most libraries have a variety of magazines, including publications dedicated to building.
Some websites provide free metal garage plans, but others have a catch, such as you must sign up with the website before you can obtain the free plans. Talk to builders and friends who have recently built metal garages or other exterior structures to determine if they've used websites that have provided plans with no hassle.