There are a few general details included for development (e.g. electricity, water, telecommunications are included), but when I think of something like construction power, etc., nothing is mentioned in the documents I have so far. But basically, am I correct in assuming that this is the responsibility of the builder because they are the client?
Correct. The client/builder builds, you are buyers of a part of a house on land, so that’s why special equipment is also included.*
All other load-bearing walls according to structural engineering.") or also "according to the architect’s specification" ("In certain areas, clinker slips, color tone and design will be implemented according to the architect’s specification.").
Are such formulations normal or should they be specified in more detail?
Normal. You certainly only have the general "sales documents" from the builder now. They probably build quite often and keep it superficial in these documents because they apply to all houses, whether it’s a two-story, a semi-detached, or a gable roof terraced house. They don’t have to present the structural engineering to you as buyers. But they have to build according to the structural engineering. And the design will hopefully change a bit now and then, so that their sales documents apply to all houses. You don’t have to worry that the house will be painted bright orange..
What is usually the process regarding "special requests"? I had read that these are already part of the notarized contract (or can be?). What is usually decided before the contract is signed, and what only afterwards?
I guess that differs from builder to builder, just as a general contractor can differ from other GCs. The contract should include the floor plan, special equipment like windows and doors, and technical upgrades.
We are in the construction phase and I’m sending an expert over
There are good and bad builders: the bad ones don’t even let the buyer, let alone an expert commissioned by them, onto the construction site. As a buyer, you depend on the builder’s goodwill. However, you don’t have any rights in this regard.
So can I expect that I will soon have to select tiles and determine sockets before the contract is signed, or does it first involve more fundamental things (possibly moving a wall or something)? We will certainly ask the builder directly again, but it doesn’t hurt to know how it usually works ;)
Are you sure all tiles are included? Or only the wet rooms? There are builders who don’t even offer alternatives or options to the construction description… it’s also possible that they say: I don’t care. Arrange that with the electrician. Then you’re lucky because the electrician is usually cheaper in the final price but you only have a 2-year warranty on exactly that product.
An additional socket costs about €50,
It can also cost €19 or €89...
: definitely ask about these prices. Ask for ALL prices that might be relevant. Later special request prices can also be recorded in the notarized contract now. Whether €30/sqm for tiles is enough depends on your standards. There are also nice tiles in the budget range. You should inquire, for example, about the cost of wood-look tiles. The tiler and thus the builder can easily charge three times as much for installation.
Learned something new. Thanks to you! But overall, everything else is probably very similar.
The catch lies in the similarity. Because much is _only_ similar. That means: much is different.
but somehow financing discussions,
Usually you already know your budget limit. Then financing goes faster than if you have to painfully find out your limit, go home worrying, constantly crunch numbers, and thus frequently have to discuss changes with the bank.
We currently have, among other things, a construction description,
Then show it. You’ve been reading here a while too, so you should know that you can only evaluate the content if you know it. The exposé as well (ID and portal name, no link, no advertising) would be helpful. How does the offer compare in your region? What kind of provider is it? You can ask here in the moderated forum as well.
https://www.hausbau-forum.de/forums/erfahrungen-mit-hausbau-firmen.119/
https://www.hausbau-forum.de/categories/hausanbieter-deutschlandweit.293/