Think about your garage size. If you are someone who owns or thinks they may own a large pickup, suburban, etc, increase the size of your garage. Think about where the stairs in your garage lead into your home as it may take length away from you parking a vehicle. Larger and longer garage is always do able and worth the money. Larger vehicles will have to be placed in at a diagonal and will take room from your third stall. Also a huge benefit if you are someone who has toys such as boats etc.