You also have a loft in a barn when the hay used to stored. Also we have apartments (flats) as you mention normally called loft or attic flats or apartments.
Last year I fence blew down and our neighbours put a new one up for us (we of course paid for the materials) on the left you can see our pigeon loft. As loft can also be a building in a garden for pigeons we have a pigeon loft in our garden which is really just a large shed designed especially for pigeons.
We also use the term loft to mean storage place for hay.
More fun translations:
stove (US) = cooker (UK)
potholder (US) = oven cloth (UK)
truck (big rig) (US) = lorry (UK)