"EXT" wrote in message
anews.com...
Personally, I would not think in the terms of a "room built out of
construction materials", instead I would consider an "oversize cabinet".
It could be built out of some framing materials with dados in the sides to
fit in a sheet of plywood or whatever is preferred. This method could be
used for all the walls. The ceiling would need a little more engineering
to make it strong enough for storage. If one were to build a very large
cabinet, there would be no need to pull a permit, it would keep the weight
down to reduce structural consideration on the existing building floor and
would be simpler to build and possibly knock down when the time comes.

I wonder about the whole situation. Is the building zoned for living space?
There may be some serious code issues if it is truly an industrial building.