Single-family house with a granny flat on a 450 sqm hillside plot

is really missed. He would know the most sensible way to place a house on the plot without exceeding the floor area ratio and moving as little earth as possible.
Calculate the new budget.

The floor area ratio is not the correct measure, but the site coverage ratio, as we have found out. In my opinion, this problem is therefore completely resolved. The original poster can build 180 sqm, two stories – I believe he neither can nor wants to exhaust that fully. It would be very helpful if the text version of the development plan were also disclosed, so we don’t have to find out only at the end of the thread what is and isn’t allowed.

I have compressed my proposal a bit to accommodate the budget:








Roughly estimated, this would be about 150 sqm for the ground floor and upper floor. Twins would have to share one child’s room. I doubt that the expansion reserve is actually needed. Possibly one goes down to zero with the knee wall here and saves further space in the attic. Also the question of when the first child moves out again.

Unfortunately, you are completely right. The rental income was included in the budget of 550,000 euros. In addition, until recently, we assumed an additional good 60,000 euros from the KfW.
I will calculate exactly again tomorrow morning.

So, I did another cash count and left out the naive granny flat.
500,000 euros for the house including incidental construction costs would be the maximum without becoming unreasonable. It can certainly be cheaper.
With an assumed price per square meter of 2800 euros, I estimate that 150 sqm is possible.

The floor area ratio is not the one, but the site coverage ratio, as we had to find out. In my opinion, this problem is completely resolved by this. The original poster can build 180 sqm, two stories – I believe he neither can nor wants to fully utilize that. It would be very helpful if the text version of the development plan were also made available, so that we don’t only find out at the end of the thread what is actually not allowed or allowed.

Sorry again, this misunderstanding was my fault.

The salesperson in post no. 19 was definitely wood stud construction. I know the plans. We had discarded it for cost reasons. Wood stud constructions also tend to result in tower building. Many simply build a basement under their standard city villa.

Take the minimum energy standard and look for house building companies that focus on that. Should save a few euros. is really missed. He would know how to sensibly place a house on the plot without exceeding the floor area ratio and moving as little earth as possible. Calculate the new budget.

Indeed, it was probably about selling as much wooden houses as possible. Basically, our plan was to build using wood stud construction. To be able to compare costs, I called a local general contractor who builds with solid construction. He also mentioned about 3000 euros/sqm for turnkey construction.

At an assumed price per square meter of 2800 euros, in my estimation, 150 sqm could be possible.

Roughly calculated, one would be at about 150 sqm for the ground floor and upper floor. Twins would have to share a children's room.

Well, what a coincidence - how it all comes together again... ;)

That already looks really great again. Thank you very much for all the work.
So it doesn't necessarily have to end up with the caravans after all. :D