If so, what do you use it for and was it worth the money? I’ve had quite reasonable quotes to put one at the end of my garden (insulated, power, etc so completely usable all year round) but it just feels like quite a decadent thing to do.
I could definitely use the space - I have visions of having bookshelves and a couple of comfy chairs and maybe a desk in it, but I do only live in a two bed house! Not sure how much value it would add?