New Construction Financing + Contractor

I also find the house construction forum great.

We have many questions and would be grateful to learn your recommendations. Thank you in advance.

Financing
We intend to build a house (city villa) with a bay window using a builder.
Living area according to DIN: 160 m²;
Net floor area: 170 m²
Enclosed volume (DIN 277): 690 m³
The house should cost €220,000 including underfloor heating.
Construction method: solid house
Is this offer still "within range"?
Plot: €160,000 excluding property transfer tax and notary fees

How much would I have to finance (equity capital: €50,000)?

Builder
We have the option to choose TÜV supervision with an extra charge of €2,500, although the house will be accepted by TÜV in the end.
What is your opinion on this?

What are the indicators to get a sense of whether the business partner (builder) is competent?

Where can the construction description + the construction contract or the offer be checked afterwards?

Hello,

...We intend to build a house (city villa) with a bay window together with a contractor. Living area according to DIN: 160 m²; net floor area: 170 m², constructed volume (DIN 277): 690 m³
The house should cost 220 k€ including underfloor heating. Construction method: solid house
Is this offer still "within range"???

The question about the price is difficult to answer at first glance and without more detailed information; the financing specialists here will surely contribute something.

...What are the indicators to get a feeling whether the business partner (contractor) is competent? Where can the building description + the construction contract or the offer be checked?

For this, we have compiled all important data here in the forum in the section Building help for owners => "before signing the contract."

Basically, it should be noted that an external consultation before signing the contract is a very good decision. It does cost a little money, but money which is in my opinion well invested in advance, if you take a look at the current reporting in the media.

Kind regards