Active job

Shower removal with new walkin and tiling.

I want to remove my old small shower and create a walkin: 1. Tear our old crappy shell 2. waterproof/gib prep for tiling 3. Tile area 4 . Fit shower head (in same spot as old shower. - I wanted to keep same spot for drain and faucet. - It is concrete slab flooring so will need to create a step up in order to make a fall to the drain. - there is a full height window that will be inside the shower and I am looking to replace it with double glazed (no open) window so some consideration needs to be included in quote for that - heated towel rail needs to be moved (I can get our electrician to do that prior to work being done. I have added an idea of what it could look like (it's just an image I took off the web, may want to change tiles/colour etc)