Basic free shed plans vs advanced premium shed plans. so what�s the difference between our free and premium shed plans. well apart from the obvious that one is free and the other is a paid for product, the main difference the level of detail in the plans.. If you need extra storage space these shed plans can solve that problem. these free shed plans are for different designs and are simple to follow along. free shed plans. shed designs include gable, gambrel, lean to, small and big sheds. these sheds can be used for storage or in the garden. see the list of free plans below. gable shed plans. University of tennessee has 23 free-to-download shed plans in pdf format. the dimensions range from 12