Shift drainage in the shower area

Hello,

we have a bathroom (built in 2005) that we would like to renovate. After a lot of research (vinyl, concrete, epoxy), we are practically back at the beginning, i.e. the tiles will be replaced.

We thought it would be good to relocate the drain at the same time. This would allow us to use slightly larger tiles, as the slope only goes in one direction. Instead of the drain in the middle, we would like to install a channel at the front on the wall (there is an installation shaft at the front).

Is this even possible, and what kind of construction can be expected here?

Thank you.

Your description is not clear, the door is at the front and not a wall. If the shower is to be flush with the floor, then the door tile edge is probably set, or should the entire bathroom floor be redone extending into the shower?

I agree with you, here is the adjusted photo. The shower should be flush with the floor. Only a channel along the back wall. The nicest would be to have the same level everywhere with the same tiles.

The question is of course also whether it is worth relocating the drain (it's almost 20 years old). Because of aesthetics, one could perhaps cut larger tiles diagonally and achieve a slope.

How can one see if the area is still watertight?

How can you tell if the area is still sealed?

If everything in the floor below is dry, the seal should have worked until the end. When re-tiling, of course, a new seal must be applied. We have 60x60 cm tiles in the bathroom and 10x10 cm tiles under the shower area due to slip hazard.

By new sealing, do you mean the layer between the screed and the new tiles (e.g. sealing membrane)? Thanks.