Gallery railing / glass atrium - Which trade does that?

There are aluminum floor profiles with abP available for purchase, approximately €165/m. These are usually installed with M12 bolt anchors. You can do this yourself with some craftsmanship.
There are then M12 bolt anchors in the concrete every 250mm, which holds the profile very well.
I opted for a variant with an L-profile, meaning the screed is also poured at/over the profile.
Additionally, a 17.52mm laminated safety glass (VSG) made of tempered safety glass (ESG) for about €600 (3m x 1.1m). Overall, my railing with mounting material cost me about €1150. Depending on preference, a handrail made of stainless steel or alternatively wood can be added.
The result for me is a glass railing coming out of the floor with no visible mounting profile.

Glaziers and locksmiths wanted around €3000 for such a railing.

So about €1800 saved through independent planning and one day of installation.

Thank you for the answers. Our stair builder wants 1250 euros per running meter plus VAT. We need 2.47m. Here is an example of how we would like it.

The price is definitely a statement. But you also chose the most expensive version of a glass railing.

That's pretty much how it looks with us. If the schedule still allows, you could contact a glazier.

It looks pretty much like that for us. If the schedule allows, you could contact a glazier.

You can't complain about 500€/m for that.

That's pretty much how it looks for us. If the schedule still allows, you could contact a glazier.

We have just under half a year left. That should be enough.