Building a potting shed
Among small buildings you can create without council building consent, a potting shed is very handy. The fact the builder agreed to put up this structure to get the gardening tools out of his shed is another story.
If you can possibly choose a flat site, do so. In this potting shed, the only site available was on a hill which meant a fair bit of work for the builder because of the extra labour and time.
Then in order to avoid the need for a building consent, measure the site up to ensure the 10 m2-or-less potting shed is no closer to the boundary or to a dwelling than its own height. In this case, the boundary is nearby but there are no dwellings close by to worry about. Here the original idea was a three-metre long building but it had to be shortened to 2.1 metres because the boundary was closer than first thought.