How many square meters are possible for KFW40 turnkey with a budget of 150,000€?

a model home park in which all residential houses are anyway much too large for a couple and offspring.

Make an appointment with any of the companies for a model home family tour. Most people actually imagine the smaller versions there. Then you'll think about it quite differently.

Even I have to say, no, that doesn't work.

100sqm Energy Saving Ordinance without base plate, with very minimal equipment, or possibly without floor coverings and painting work.

That works.

Hello, thanks again for all the opinions! Thanks for the hint regarding links!

Regarding kfw40 plus, I had seen a table that stated: KFW 55 causes 5% additional costs, kfw 40 causes 10% additional costs, 40+ causes 15% additional costs. My mistake was, of course, that the table assumes a price of 300,000-400,000. The goal was to build once and save annually.

Thanks KingSong for the warning. I was really surprised that a provider does this.

The 150T€ is supposed to cover the house alone. Ancillary building costs were not planned, but now I know how unrealistic the whole project is. The budget should include interior furnishings including kitchen excluding Carport / outdoor area.

Rather 1 child, and towards a small room, additionally a guest room.

Do you have a tip on how to implement projects? winnetou78 or do you sarcastically join the majority? :)

You can't fit 4 rooms including technology into 100 sqm. Unfortunately, your idea is far from realistic.