Financing bungalow new construction without basement

You can probably find out from the responsible provider in the price list or inquire. The same applies to personal contributions; you can sometimes dig the trench yourself. However, for 50m, it will cost a ton of money. Expect at least 10,000 euros, possibly a bit more.

And what about drinking water, Telekom, and electricity, they use the same trench, right?? Or do I have to dig again?

They use the same trench if possible, but on different levels. Wastewater at the very bottom, then water supply, then electricity / telecom. Very rarely: If they lay the electricity (water / wastewater / telecom) from somewhere else like the wastewater (water, electricity, telecom), it can happen that you have to make 2 trenches. Such things can be clarified with the suppliers in advance. With us, the same trench was dug up 3 times and compacted again. They all didn’t want to talk to each other there. So: pipe in: completely closed: opened again (a bit less, so the pipe underneath doesn’t get damaged): pipe in: closed again: and so on.

They use the same trench if possible, but on different levels. Wastewater at the very bottom, then supply water, then electricity / telecom. Very rarely: If they lay the electricity (water / wastewater / telecom) from somewhere else like the wastewater (water, electricity, telecom), it can happen that you have to dig 2 trenches. Such things can be clarified with the providers in advance. With us, the same trench was dug up 3 times and then compacted again. They all did not want to talk to each other. So: pipe in: completely closed: open again (a bit less so that the pipe underneath doesn't get damaged): pipe in: close again: and so on.

And every time you had to pay, that's a rip-off, if the trench is opened once everything goes in and then closed again. I'm not paying for that crap twice or thrice.

You can try negotiating with them - for us, the first 5 meters were included in the connection price and our handover point in the house was only 3 meters away, so I didn't give a damn if they dug it up multiple times,... For the neighbors it was necessary because the gas arrived six months later - the gas people took their time - but in order for the scaffolding to be set up, the trench had to be closed again. There is usually so much other crap attached that you can't leave it open. And then you end up digging multiple times. In our region it was/is IMPOSSIBLE to get the utility providers together. It is already an act of God's grace if they ever show up at all. Then you are just happy when they lay the line.