House construction planning / comparison of prefabricated house providers

Hello!
Is anyone else still in the initial phase and looking for the right provider?
I have already had 4 consultation meetings with Scanhaus Marlow Marlow, Pro Haus, Renschhaus, and Fingerhaus and now I am even more confused or unsettled. Everyone has different services in their construction descriptions. How am I supposed to know what is necessary and good? I have already informed myself based on the book "Die Muster - Baubeschreibung" by the Verbraucherzentrale, but I am still overwhelmed.
I want a completely ready-to-move-in house and not have to deal with things missing at the base slab or having to hire someone separately for any issues.
Did you show the construction service descriptions to someone for review before deciding on a provider?
Why did you decide on the provider? Because of the price or the construction service description?
I think with Fingerhaus, for example, everything is named, but for me, it is also the most expensive provider. With Pro Haus, I am not sure if there are some gaps in the construction service description, but the price would be good.
Can someone help me? What do you think of the provider Scanhaus Marlow Marlow or Renschhaus?
Thank you very much!

a completely finished house just like that without any personal tweaks? good luck. maybe with the developer who is also the owner during the construction phase. the house connections actually never belong to the scope of services of the construction company (never seen that anywhere), just like sewage and rainwater connections. furthermore, all the paperwork with the authorities and the notary has to be handled by yourself. that's what I'm currently struggling with. instead of sending one invoice for everything, there is a separate invoice for every tiny piece of paper. here 25 euros, there 95, and so on... what can be included without major problems: kitchen, floor and wall work, outdoor area, carport/garage, driveway if you don’t want to deal with all the paperwork and decisions, there are two options: buy an existing property or hire an architect with power of attorney for all that stuff. if the architect for some reason is not allowed to do that, there is surely another legal person who can (with few exceptions like buying land). comparing the scope of services in general is not easy. I created an Excel list back then and split up the construction service descriptions. in the end, it’s basically your gut feeling that wins.

No, of course I have to take care of house connections, etc.

It was more about the fact that, for example, something might be missing on the foundation slab for some people. At ProHaus, it reads that I have to ensure that it is level and that the last layer of gravel or something has to be done by the builder. Since I can't do that, I would have to hire someone again. Then I wonder why that is not included for me or mentioned as an extra charge. But maybe I just haven’t understood a lot of things yet

Or, for example, insulation of the foundation slab. At ProHaus it doesn’t say anything about an insulated foundation slab, but at Fingerhaus it does. Do I need that, do I have to hire someone extra again, etc....

Normally, a base slab with 30cm of gravel is included in the price (this is very common at least for solid houses). Additional earthworks are charged separately. Either a base slab is included in the construction service description or it is not. The construction service description is the 10-20 page document at the end where every step is explained. It MUST say something about the base slab there. Either it states that one is included or that you have to provide it yourselves.

Of course, you don't have to do any manual work yourself; everything can be commissioned.

For example, it says: "The client carries out the earthworks in consultation with the site manager, including the creation of a level cleanliness/filter layer d=15 cm with a grain size <= 32 mm at his own expense."

Who does this, and how much does something like this cost?

Or: "During the construction period, groundwater, surface water, or seepage water (...) must be removed from the excavation pit. (...) Any sealing and insulation measures are at the expense of the client."

Who does this, and how much does that cost?

Is it normal that the client has to take care of something like this themselves?

Then it says that the site facilities include all tools, machines, formwork materials, and possibly scaffolding for the duration of the foundation construction period. So, not for the entire construction period including interior finishing? Does this also include a site toilet? Otherwise, I cannot find any other point about site facilities.

I mean, in the end I will have an expert check it anyway, but to know beforehand what I have to add on with one provider and what might already be included with another, I should understand this as well.

Regarding the base slab, it says: "The base slab is made of reinforced concrete of quality C20/25 according to DIN 1045-1 in a thickness of approximately 20 cm and is evaluated according to the structural analysis. A protective foil is laid underneath the base slab."

I know it this way: a small part of the earthworks is included in the price. this establishes contact with an earthworks contractor who then takes over the additional work and invoices the builder. if earthworks are not included, you have to find an earthworks contractor yourself. has pros and cons.

it also doesn't hurt to go to the companies with your ideas and go through the construction description. take notes and make an appointment and ask the people questions. the turnover of a house is always six-figured, and a lot of consulting hours (advertising phase) are included in the price beforehand.

in the end, having an expert take a look is definitely a good idea. it might save you unexpected costs that would otherwise have eaten you up.