SO8402 : Building, Selsey Road, North Woodchester, Stroud, GlosCaroline Evans is correct in her suggestion this building was associated with the wool trade.
Large windows to let in the light suggested to me it was a weaving mill (there are many in my mid-Wales home town).
I found details of this building in the Gloucestershire Historic Environment Records here:
Lancaster House, a former loomshop near Woodchester Mill, Selsey Road, Woodchester