Years ago I designed a building front for a laser-cut kit. The project never got any farther than that, but they did send me a bunch of test shots, on various thicknesses of plywood and MDF.
Over the years I have used them all to make buildings, and this is the last of them, 6mm MDF.
As always, the body is made of coffee stirrers on a craft stick frame. The walkway, awning, and floor are made from craft sticks.
Because the building front is already plenty thick, the boards on the back of the hoarding are just scribed on.
The framing on the corners and the hoarding are made from coffee stirrers. Sign and door/window trim are matchsticks.
The sign was printed on my computer, then transferred to the building front with a pencil. I then painted the letters with a brush.
The roof is styrene, covered with O scale corrugated sheet. Since I was unsure how corrugated sheet was sold in period, 4X8 sheets seemed a good enough size, so I laid 4X8 sheets like giant shingles on the roof.