How do I bathroom / kitchen / extension? etc.

Just had a tiling quote in for our very small bathroom (2m x 1.5m), and it seems high to me. It's 3m2 of flooring, with the floor tiles also on the bath panel. And then subway tiles on 4 walls totalling about 16m2. Any thoughts? I'm obviously not an expert, but it seems like a lot of time to do a very small room.

Labour = 6 days

1 day build bath panel and access hatch, fix boards and tile

1 day floor (concrete sub base) + boxing, tiling in floor tile

3 days wall tiling. Based on 200x100mm tile and non black grout

1 day finish. Grout etc

£200 per day x 6 days = £1200 + materials

Timber, screws, ply, primer, adhesive, grout, trim for window = 2 lengths, miscellaneous
= £215