We have decided that our dining room is really a waste of space (only used once a year on christmas day) but cannot decide whether to make it into a seperate 2nd lounge (useful for when dd has friends round) or to knock through and have one large living area. We intend selling and moving in about 2 yrs time but dont know whether we would be devaluing the house by knocking through and losing a room IYSWIM. Anyone done this and had their house valued before and after? Any advice would be appreciated.