This step by step project is about 4x12 lean to shed plans. i have designed this shed so you can build a simple tool shelter, even if you only have a narrow space for it. this shed features a lean to roof, a door on one end and a window, so you can have some light inside.. Free lean to shed plans | free outdoor plans - diy shed, wooden playhouse, bbq, woodworking projects from myoutdoorplans .com - january 10, 2013 11:48 pm.