Construction costs for a single-family house with a basement in NRW

Be careful with internet research and nationwide statistics. What use is the price in Uckermark if you want to build at Lake Constance. Internet information is extremely general and especially old. What was valid 2 or even 5 years ago is no longer directly transferable due to the construction boom.

Better make the ventilation 12K€, I don’t know about the air conditioning, so let’s take 5K€. 17K€ on 170sqm is 100€ extra per sqm. Pay attention!
Ask these two extras from the developer ...

Your example with the garage is nice. Just ask Rekers or someone else for fun. A concrete offer. Then see what it says on it. Find out what is not yet included in the offer - e.g. medical expenses, foundations, electrical supply lines, drainage, extra charge for side entrance door (the nice one please) and so on and so forth.

This industry is characterized by “starting from” prices. When you get into the topic you see the publicly available information and think “oh, it’s not so bad after all.” You learn. The only good thing is to remember beforehand that the plan is not realistic. Afterwards would be bad. That’s what this forum does.

We also thought that with a lot of own work we could get below a price per square meter of 1500. No chance, despite several thousand hours of own work.

Key data:

In NRW, but very rural (standard land value 80 euros, but of course the land value is not included in the price per square meter)
Central ventilation
Geothermal energy
Double garage
160 sqm living space
Electric shutters

With your wishes, I would calculate at least 1800, rather 1900-2000 per sqm. I’m not familiar with basements, we decided against it.

That's why I'm looking at the current statistics for NRW. 1480 in 2016 in NRW. Yes, we will see what that costs. In the end, you'll have to cut back or think of something else.

Central ventilation 14k, decentralized 7k