I remember seeing a Short Black and White british film quite a while ago. I only vagely remember seeing it, but I believe it involved a building a group of houses.
I remember Peter Sellers starred in it for a brief time... at least I think it was him. At the very end he discovers that the taps turn on the lights and the light switch turns on the taps. I have no idea what the film is called... or if it's even real or not.