Not just warehouses. In one facility here in South Florida a family member who is a general contractor, uses the storage just as you described, but a couple of units over, there is a gun range, a gun smith shop, a tattoo shop running out of these "self-storage" units. It's legal too, kind of strange how it would be, but I see cops at the range often enough.
alexpotato · · focus · HN ↗
e.g. let's say you are starting a painting business
You have a lot of equipment you need (ladders, sprayers, buckets, etc) but you live in a small apartment.
A self storage unit can hold all of the above and the storage price is probably tax deductible.
stasomatic · · focus · HN ↗
rbanffy · · focus · HN ↗
If it's not legal, I'm sure the cops don't know.