We have added a lean to shed to our 16×20 storage shed library. The large 16×20 size allows for a huge amount of storage or work space. The plans include wall framing plans showing how to build the door opening on any of the 4 shed wall. This allows you to place the door on either the tall wall, short wall or end walls. The plans come with two foundation options. It can be built on either a concrete slab or a wood skid foundation with a framed floor. This allows the shed to be fully permanent or semi permanent. So if you need plans to a large lean to shed the 16×20 will provide the information you need to plan and build your project.