House construction 130 sqm turnkey

In the end, we ended up with a different provider and are currently finalizing the overall budget. But since you are asking about the final...in the meantime, we dropped the basement because it was too expensive and then considered the Bodensee 129 at Town & Country. I'll attach a snippet from my comparison table. It is certainly overestimated in some areas and underestimated in others (and in the final calculation, I have taken that into account in some places), but you can see immediately that we are much further away from the overall budget. The price of €270,000 just doesn’t add up at all.

What is usually the cheapest are not the national providers with large advertising budgets and model homes. That costs a lot of money. You won’t get below €2000/sqm of living space even with the simplest standard if you have everything done. Plus €50-60K for the basement, plus incidental building costs (where the basement really adds up in terms of earthworks, perimeter insulation). And do yourselves a favor and don’t build with the first cheapest option but with one that also builds properly. Otherwise, after two years, you still won’t have a house, you’ll be paying the bank readiness interest diligently, and you’ll have lots of trouble. Search the forum for "Fleischerhaus"

There are simply not enough details to evaluate it. For example, basement execution -> utility basement with low ceiling height, surface-mounted electrical installation and no heating, or basement in residential quality. This is contrasted with what the builder expects. This runs throughout the entire construction.

Say, are you kidding us?
Someone who thinks about cheating in the forum, you could actually cheat them right back...

a friend

Here is an overview from the developer's homepage.

So he apparently got the offer yesterday.

I think you are taking an extraordinary amount of time for a friend... This commitment may certainly be great, but I don't believe it for that reason! A friend... and constantly investing time here in the forum... do you guys talk every day, or how does he keep you updated? The first thing he does after getting the offer is contact you?

Allegedly

allegedly everything is included

I find these alleged attachments anything but credible. You don't write like that if it really happened. Especially not piece by piece... Are you being questioned here, then a new piece of information comes up... do you have a direct line with Mr. Friend??

all incidental building costs

Incidental building costs cannot be defined beforehand.

For house connections, supposedly a flat rate of 8,000 euros was estimated, here the risk would also lie with the company.

I haven't read such nonsense in a long time... sorry, but what does a developer have to do with house connections? Nothing!

allegedly the risk for everything related to the house would

Yeah yeah... allegedly...

I originally read that 2,000 euros / sqm is the lower limit with own labor and plus incidental building costs, wouldn’t 280k without own labor including everything be too little?

Take that as the house costs, everything else is on top... everything! Your friend can get properly informed.

What is usually cheapest are not the nationwide providers with a big advertising budget and show homes.

The big names have above all one thing: people who have studied for a long time how to make offers so that they look cheaper than the local construction company Jupp Schmitz & Sohn.

I think you take an extraordinary amount of time for an acquaintance ...

Youuu ... Dad ... Charly said his father said ...

He is asking for a friend.

What nonsense :D Additional building costs are never all included

If it is really a property developer, then yes.

At first it reads like a car order:
Vehicle with
- four wheels

Correction: Vehicle with four wheels, tires from Goodyear. ;)

allegedly the risk for everything that belongs to the house lies with the company.

I know that exactly the same from a property developer. The building service is not sold, but a finished house on a plot, meaning the developer has to ensure that the contractually defined object is erected - no matter how. That is a world of difference. The fact that there may be surcharges for special equipment is common to both models.