Installing a walk-in shower - is it possible?

Hello dear construction experts, I hope you can give me some tips...I am facing the following situation: I have inherited an apartment. The bathroom is a typical 90s standard white-tiled boring bathroom, which is functional and practical, but gives me aesthetic stomach aches when I enter it. Therefore, I feel compelled to invest in it and make it look nicer. The problem is – I don’t know if it can be done the way I imagine it – and for that I need some help. My plan: I would like to have a completely barrier-free bathroom with linear drainage and completely tiled in slate (I am attaching a picture I found on the internet as inspiration for better illustration). However, underneath the current tiles there is an electric underfloor heating, so I am probably limited in opening up the screed. What would be the ideal approach here? Or, if this is not feasible, is it possible to build the shower higher (on a raised base or a stud frame)? Or maybe the whole bathroom? What do I need to consider / what do I need for that? Thanks and best regards to all helpers

Send a picture of the current bathroom. Otherwise, the idea is super simple: knock everything out, screed, electric underfloor heating out, and then completely redo everything.

You should probably include photos and drawings of the actual floor plan instead.

Since you need a slope IN the screed, that can only be done by breaking up and redoing it. It will be difficult if there is underfloor heating installed. If it really has to be level, then the only solution is to redo everything.

You could raise the shower area by one step (ask the tiler you trust) and have it level there, or install a shower tray - at the zero-barrier point you can see an example from bathtub to shower tray.

Since it is not level, it is definitely more realistic to accomplish this without damaging the underfloor heating.

Thanks for your tips... I had already feared that this would probably be a rough-and-ready action and that the eFBH would present another problem. In this respect, I will probably follow fragg's advice and raise the part on which the shower stands by one step – otherwise it will simply be too complicated. Is there a smart approach to doing this (the raising)? ... of course I would ask the tiler I "trust"... it's just always good to already have an idea of how you want it and not have to rely on the first suggestion... So, thanks in advance for further ideas! Best regards

You should probably provide photos and drawings of the ACTUAL floor plan

Sorry, I hadn't thought of that at all.

Unfortunately, I can't provide photos as the apartment is still rented at the moment.

Dimensions: 3.46m x 2.38m