This is identical to the ‘Utility Shed’ except it is surrounded with industrial style windows and is sheathed in standing seam steel sheets.
I originally came across this structure wile driving up Sheridan Rd somewhere between Chicago and Milwaukee. there were about 20 of them side by side and in rows over a very large area. It looked very Area 51ish. This building is also available as part of the “Steel Industrial” DVD

O Scale $5.95, S Scale $4.95, HO Scale $3.95, N Scale $2.95