Construction site: high noise level and flood area

Hello everyone,

I have several questions.
I would very much like to build a bungalow and have found a suitable building plot, but I have not applied for it yet.

After looking at the development plan, I am doubtful whether it is worthwhile.

1st question: The noise level is between 66 - 70 db. There is a train station nearby. Of course, soundproof windows class 4-5 are required, which means I have to expect higher costs. But has anyone already had the experience of lying on the terrace in summer with this noise level?

2nd question: This new development area is at risk of flooding, i.e., HQ10, HQ100, and HQ extreme are marked. HQ extreme is already almost at the edge of the new development area. Is it sensible to build there?
Of course, there is always some risk. Does this make house construction more expensive? I have planned to build without a basement. Considering the worst-case scenario, should the house be built 60-80 cm higher? Horizontal barrier against rising moisture?

3rd question: A rain retention basin is planned, does it smell in summer?

4th general question: If a city water line runs under a building plot, is that not a problem for the builders? In case the pipes leak or need to be replaced.

I hope I have formulated the questions clearly.
Thank you

Best regards
Gelendd

You want to build there?

Welcome to the forum.

Regarding 1) Trains come regularly there. Stand or lie down on the property and check for yourself if the noise disturbs you. Do this tomorrow and report back ;)

Regarding 2) I find your description confusing. Is HQ extreme in front of or in the new development area? That is not clear from your text. What HQ class does your specific property have? The rest does not matter, what is in front of the new development area. I would take the HQ of the relevant property very seriously, the weather is becoming more extreme with climate change.

Regarding 3) Water evaporates in the warm summer. What is your specific question?

Regarding 4) No, not the builder's problem. City pipeline == city pays for renewal.

Personally, I would prefer to look for a less problematic property.

3rd question: A rain retention basin is planned, does it stink in summer?

Probably rather not, but mosquitoes and other insects will like to stay there.

too many ifs and buts

1st question: The noise level is between 66 - 70 dB. There is a train station nearby. Naturally, soundproof windows class 4-5 are required, which means I have to expect increased costs. But has anyone already had experience with what it is like to lie on the terrace in summer with this noise level?

We had looked at a house on a 4-lane access road leading to/from the city. There was a noise protection wall built here, and behind it the noise level was still > 50. 66-70 dB means "translated": normal conversation, sewing machine, TV at room volume. And noise is stress. For me, it would be too loud.