
Anyone who has watched the episodes several times will be familiar with the room layout, and the fact that it seems to change every episode, especially upstairs. In fact one would probably need twelve different floor plans for the upstairs to represent every combination.

Of course there may well have been building work carried out between episodes that we never saw until it was completed, and judging by the look of the place (the way some of the walls wobble), it might have been carried out by Mr O'Reilly rather than Mr Stubbs.
Don't forget to check out Kirk Stacey's floor plans for Only Fools and Horses or if you want to know more about Kirk's art work you can visit his Web Site