Middle, not along wall, is my advice. I have built this very thing, and my shed office is where I am writing this comment I started out with a smaller space a

Middle, not along wall, is my advice. I have built this very thing, and my shed office is where I am writing this comment I started out with a smaller space and then rebuilt. Currently 4.4m by 2.5m, so not to dissimilar to your plan. My biggest issue was heating as I am in the UK. I found I was getting chilblains in my feet during the winter months. My advice is not to have your feet against the shed wall because of the cold gap. In my bigger space I have my desk centred, with the desk drawers between where I sit and the wall. This means I'm not against a wall on either side. It also means I am not sitting right on top of heat sources, which we tend to put on the wall. The sun is shining on my legs and feet at the moment, which is ideal. I fitted a large, second-hand double glazed window from Gumtree. I used to run ethernet from the house but I now have an external wifi point screwed to the wall of my house. It's been working great for a year or so. The shed is about 15-20m from house.