We are currently in the throes of property search and all the places we like and are viewing at the weekend have tiny kitchens, with separate living rooms and dining rooms. Ideally we'd knock the kitchen and dining room into one, keeping the living room separate, and installing tri-fold patio doors at the rear. We know the cost of purchase and installation of the door will be about 8k (my sister had this done for a bit less last year), new kitchen about 10k but don't know how much knocking the wall through itself will be. Has anyone had this done and can advise? It'll be a brick wall not stud if that helps, and we're based in SE London.