Tiles over tiles?

Hello,

Now we are going back and forth regarding the floor on the ground floor of our house (moving in at the end of May, former owners still living there), which is completely tiled with light brown, terracotta-like (but more durable) tiles typical of the 80s to my taste.
This floor is not exactly my dream, but I could come to terms with it if it is freshened up with modern furniture and bright walls, as the tiles are extremely difficult to remove and were apparently laid "to last forever."

When we were at the house over the weekend to clarify some things, I took another close look at the floor.
Quite a few tiles have cracks (about 4-5) and the door from the kitchen to the dining room scrapes, so the tiles are damaged in that area.

My questions:
1.) We would actually like to renew the floor now, and I wonder if you can tile new, large and thin tiles (e.g. Flatile etc.) over the old tiles?
It’s 70 sqm spread over living-dining room, kitchen, hallway, and guest toilet.
We would have to sand down the doors anyway...

2.) I know prices fluctuate a lot, but how expensive is laying tiles in this square meter range approximately if you decide on 30x60 or 60x60 tiles that are tiled over old tiles? Maybe someone has experience values, an approximate number would be enough so I can better assess our offers?

I would be very grateful for tips!
As I said, we are only in the preliminary considerations, and we will visit various craftsmen and get offers during our holiday after Easter.

Thank you very much in advance,

Kate

So if you ask me, chisel out the old tiles, sand down, level the floor, and lay new ones. Everything else is nonsense. And at least that way you have an even floor.

So if you ask me, chipping out old tiles, sanding, leveling the floor, and laying new ones. Everything else is just rubbish. And at least that way you get a straight floor.

I see it the same way. It’s better to do the job properly than to botch it. @Kate32 How’s it going? Did you lay the tiles for her?

1.) We would actually like to renew the floor now, and I wonder if it is possible to tile new, large and thin tiles (e.g., Flatile etc.) over the old tiles?

That is rubbish. You would then have to sand the doors accordingly at the bottom, and the connections to other rooms would no longer fit (step). If you already have cracks in there, the screed underneath may also be damaged in that area. It should be repaired at the same time on this occasion.

That's not a mess, that's simply cheaper. You shouldn't be afraid of it, but just calculate how much money you want to spend on the bathroom. Regards Marco

It's not about the bathroom, but 70sqm.