How do I bathroom / kitchen / extension? etc.

Had a call with the Architects today - obviously there was a gap between the full spec of works and what we had for budget. Feeling better about where we've come out with. Basically we're removing a chimney and opening up quite a few walls, this basically means more steel and given the old, higgeldy piggeldy nature of the property they're being prudent with budgeting quite a bit for this work. It's a key part of the design so we're going ahead with it and cost engineering in other places, whilst leaving custom carpentry to a later date. Still got some time to go before hearing back from planning and even longer until we start but excited again about it all