Of the first two, I'm not sure which came first, but there was:
1. The house with three rooms, the Front Room; Dining Room and Kitchen with a back door as seen in Full Steam Behind. The lovely green checked curtains were exactly like the curtains in the Cafe.
2. The house with the front door on the left and upon entering, a drop leaf table under a window. The room is a front room and kitchen combo as seen in the Christmas show where Compo buys Nora a lovely hat and then scorches it in the oven.
3. And then there was Number 5, the one we remember the best.