Immission protection according to DIN 4109

I have a question about the residential development area. Does the following also apply to single-family houses?? The residential area is designated for single and semi-detached houses.

From the statute:
Provisions for special installations and precautions for protection against harmful environmental impacts within the meaning of the Federal Immission Control Act (§ 9 para. 1 no. 24 Building Code)
In the planning area, the external components of the buildings must meet at least the following requirements according to DIN 4109 (January 2018 edition) regarding sound insulation to protect against external noise for the noise level range III specified in the plan drawing:

Noise level range LPB III
Relevant external noise level: 61 – 65 dB(A) Required resulting sound insulation values for
a) office rooms: 30 dB(A)
b) living rooms in apartments: 35 dB(A)

The proof of the required resulting sound insulation values must be provided on the basis of DIN 4109 introduced as a technical building regulation in the version of 2018.

In the planning area, the external components of the rooms used for sleeping must meet at least the following requirements according to DIN 4109 (January 2018 edition) regarding sound insulation to protect against external noise for the night zones 1 and 2 specified in the plan drawing:

Night zone 2
Relevant external noise level: 66 – 70 dB(A)
Required resulting sound insulation value for sleeping rooms in apartments: 40 dB(A)

Found on the internet:
In the private law sector, there are no legally binding building regulations for the dimensioning of structural sound insulation without agreement. For apartments in multi-storey buildings, semi-detached single-family houses and single-family terraced houses, however, DIN 4109 – Sound insulation in building construction – sets out the minimum legally required acoustic building standards for health protection and human well-being that must always be observed.

Hello,

the determination in your case is the agreement. So yes, that then also applies to you if you buy a property there and want to build a single-family house.

Your online source surely refers to soundproofing for the structurally connected neighbor - that is, a multi-family house. Duplex houses should be structurally separated anyway. So you should build in a way that does not disturb your neighbor.

The requirements in the development plan relate to your protection, so you should comply with them for your own sake.
There seems to be a noise source near the construction area.

Does the following also apply to single-family houses?? The residential area is designated for single and semi-detached houses.

Yes, of course – otherwise it would be limited to multi-family houses (which, apart from usage with usually "up to 2 residential units," are typically intended as "single-family houses" in the context of single or semi-detached homes). Exterior components means, in German, exterior walls, windows, roofs. Here, at least on the sides of the house with bedrooms or children's rooms, you should equip them so that noise levels up to 65 decibels only penetrate to you with a residual level of 35 decibels. So it basically says, "build your house in such a way that you don't have to complain about the expected noise level." Essentially, this is a warning that a federal road, railway line, etc. still emits a lot of noise there.

So it basically says "build your house in such a way that you don’t have to complain about the expected noise level." It is basically a hint that a federal road, railway line, etc. still emits a lot of noise there.

And by the way, you have to prove that mathematically. Depending on the authority, they are more or less picky about it. Sometimes a graph paper with a few numbers and your signature is enough, sometimes the building permit is only granted if a mathematical proof from an engineering office/architect or similar is attached with the application.

It's about this: if you become noise-ill and your insurance carrier tries to hold the municipality liable, then they want to have taken their head out of the noose early enough; this clarification serves that purpose. This delegates to the builder the responsibility to take protective measures. Example: the highway emits eighty decibels, a noise barrier reduces it to seventy, then a protected forest area further reduces it to thirty-six, but only thirty-five decibels are allowed in the residential area: then further measures are needed, but on the property these can only be measures on the house – so someone (here most practically the builder) must be obliged to do this. This is done with a statute (here in the form of the development plan), publicly served with the publication of the development plan. Thus, the black Peter is with the builder. Only if the noise exceeds the assumed 65 dB can he complain – otherwise not (or only about himself). That is the whole solution to the riddle. It could have been said in plain language that he should do this with windows, walls, and roofs – but in official language these are summarized as "external building components."