Cost calculation for tile installation 260x90

Hello,
we are currently planning the tiles for our guest bathroom on the ground floor in our new building.

Here we would very much like a jointless solution in the shower.

Are there any experiences regarding what extra costs the tiler might charge for the work if he has to lay 2 x 260 x 120 tiles including cutting out a shampoo niche and shortening the width to 90 cm?

We look forward to your feedback.

But niches are not seamless ;)
For that, there are systems like e.g. from Dold.
The two panels with installation certainly cost about half as much as the rest of a "normal" bathroom.
It also makes a difference whether it is natural stone or something else.
Alternatively, back-printed glass.

Ok... it's a normal wall tile that just comes from the tile trade. What would you estimate the tiler charges for it?

Ok...is a normal wall tile that simply comes from the tile trade. What would you estimate the tiler charges for it?

That is very individual and cannot be answered that easily. Definitely far from the usual price. You should consider that such a huge thing needs to be transported, also inside the house, cut, worked on, etc., all of which are risk factors that need to be paid for. If your entire construction project is at a very high quality and price level, okay, otherwise I would rather see it as a risky, problematic play without any real advantage. Okay, they are currently standing everywhere right at the entrance.......next year there will be something else there..... Therefore, the hourly or square meter price doesn’t matter, what’s more important is whether the thing is also cleanly installed, and that’s where things can get tight for the service provider or for you.

My suspicion is that it will probably even become more expensive than laying mosaic when adding the markup.

We had also considered it, but then discarded it following the urgent recommendation of the builder - too complex. Besides the joint issue, the wall also has to be extremely flat. We then switched to the 60x120 format. That only results in 3-4 joints.

Alternatively, you could also check waterproof concrete plaster (I’m missing the technical term right now).