Roughly how much to...
Remove supporting wall.
Dispose of kitchen and bathroom
New 2m window (in place of 2 smaller ones) UPVC
Brick up old window (used as big serving hatch)
Skim walls
Tile floor (20m2)
New partition wall and hang door for new bathroom
New 1m window UPVC
Trench to move soil pipe 3m
Get plumbing ready for new bathroom
Need a rough idea of how much if possible.