Roughly how much does a kitchen extension cost? We have recently bought a project house and knew we would need to get a kitchen extension as the kitchen is so small and hasn't been changed for 60 years. We therefore put aside money for that purpose but not really sure how much it will cost us. There are so many other things we need to do to the house so would be good to know how much we have to keep aside. We want to try and do it as cheaply but nicely as possible (if that's possible?!) Thanks