pink palace I could have written your post myself. We are currently looking at buying but can probably only afford 3 bedroom, but I desparatly want 4-5! So we were thinking we might have to buy something that can be added onto later. I think the cost involved in selling and buying a new one 2 -5 years after the one we want to get into now would be more than extending, but I really dont know for sure? I do know that everyone who has ever had work like this done on there house says you only want to do it once! too much mess, noise, $ etc.