My shed was an average 4ftx6ft brown shed on a disused allotment plot. Having dug the plot all winter I wanted to do something else. I started work on a wildlife garden which inspired me to look again at the dilapidated brown shed that I had inherited. My plot shed is essentially a working allotment shed but it has a wildlife inspired design painted on all sides and inside the door. The design consits of a handpainted cricket, butterfly, snail and various flowers. Next to the shed is the wildlife garden including a bug hotel with various habitats for insects, a wild flowerbed and nettle patch and some giant flowers to add all year colour! The shed features a clock to let me know when to leave the plot (otherwise I stayed till darkness fell) and essentially (as water in the south is lacking) bespoke guttering and waterbutts. It also has a large blackboard with a planting guide "sow, plant out & harvest" info just like a giant seed packet and another with planting guide and bed rotation to avoid build up of pests and diseases. Inside I have nails, hooks and plastic draws for keeping plot utensils tidy.
BEST TIP: go to your local refuse tip and look in the plastic reycle skip for reclaimed items such as plastic draws, plant pots, garden furniture and disgauarded dustbins to use for water butts...I even got my hoe, trowel and hand fork from an old man who was down sizing to a residential home!