UK, a storage unit - bearing in mind you have to pay business rates etc costed at the time around £1500 a month (excl business rates / tax etc) for not that much space, I don't recall the sq/ft but a 3 bedroom large house within 1 mile of the industrial estate was (at the time) £1200 a month, it just seemed very bizarre, with a house as is it is very divided in space however.
An ex colleague of mine used to work out of a converted house in the middle of Bristol for a number of years, it was converted into a workshop / offices etc, when the CEO sold up he converted it back into a house and sold it, he stated that it was cheaper to buy a house than an actual workshop at the time, and that was around 2002 ish, he retired in 2016 so they had it a good few years, before the house the owner had a large portacabin on a farm which belonged to a friend of his, the farmer's wife died, he couldn't keep it going and sold the farm and the new owners gave him notice to move on. There are also people who I know who have said that the killer isn't the rent but the business rates, no idea how they calculate it but one building can be 2 x more than another just because of location, same size etc.