The past few months I have been building a Gn15 micro layout. It is 2x4 feet. When finished it will have two structures, this is the first finished small structure, it is a lean-too mine office.

This structure. It is entirely scratch built except for the Grandt Line door. Real glass windows. When placed on the layout, the open back-side faces a stone wall along a cliff face.
Have Fun! Cheers G