in the end, the scope of a construction service description is initially quite irrelevant. each of the listed items that are missing would only drive the price up. you can virtually book whatever you want; it just raises the price. I am surprised about the installation of the sewage pipes, which nobody has ever offered us before (not even for money).
many things are standard or rather secondary anyway. whether you have 8 or 10 sockets on the plan does not matter to a normal construction company, because more is always possible. one more socket won’t kill anyone. otherwise, there is the trick to only take single sockets and later “make them bigger” yourself (the cable is already there). the entire network is missing.
overall, there are quite a few things included that are not automatically standard. (e.g. OSB boards in the attic – especially good without a basement // in the earthworks, the driveway is already prepared // reasonable bathtub size, but ridiculously small washbasin size
the usual “extras” are missing:
- underfloor heating
- ventilation system
- information about KFW
- a 120-liter hot water tank is pretty much the limit for 3-4 people – solar? (with solar, there is usually always 300 liters)
- roller shutters are only mechanical, because the electric ones would definitely have been advertised (mechanical doesn’t last long, at least prepare electricity if you can’t or don’t want to spend the money right away)
all the mentioned “missing extras” add up roughly to 20,000 - 25,000€ again, depending on what still needs to be done for KFW.
what about insurance? which ones are included, which do you have to take out yourself?
much more important than what is included is the seriousness of the construction company. is this the original construction description or did you copy it yourself to avoid advertising? because the original would not seem very serious to me.
have them show you current construction projects. look at the houses directly, that way you get a direct view without “pre-cleaning.” check back a few weeks later and see if anything has happened. especially in the shell construction phase, a lot must have happened in 3 weeks, which even a blind person can immediately see. (with us it took 3 weeks from meadow -> topping out ceremony)