ᐅ How is the sealed surface area calculated?

Hello,

we are currently calculating the area that has already been built on to find out how much additional construction is still allowed.

I have a question: Is everything counted 100% towards the built-up area, or are some elements only partially included?

The following areas are generally considered built-up.

The house and garage are definitely counted at 100%.
The terrace with concrete paving slabs most likely as well.
The garden shed is almost certainly counted at 100%.

But what about permeable concrete joint paving?
Could these perhaps only be counted at 50% because they are permeable?

I hope you can help me.

Pwnage619 schrieb:

I hope you can help me

Unfortunately, only to a limited extent, as this varies depending on the federal state and wastewater association. This is how it is here in Central Hesse:

Thanks for the hint.

Does anyone know what the rules are in NRW?

Can anyone help me understand the regulations in NRW or tell me where I can find these rules to read up on them?

A second question is whether raised garden beds are also considered sealed surfaces.

Try searching for land use ordinance = Baunutzungsverordnung

For me, or in general, I would understand that anywhere rainwater can normally seep into the ground is not considered sealed surface. This applies to planting beds (including stone beds) and lawns. Edgings are also not counted as paved or built-up area.