ᐅ Which developers build with POROTON in Schleswig-Holstein?

Hello dear forum community,

We are also about to make our dream of a lifetime come true.
The plot of land is already secured, and now we are looking for someone who can bring our ideas to life. Since we would like the walls of our townhouse to be made of POROTON, we keep noticing that in the northern regions, construction is often done with aerated concrete blocks (e.g., Ytong).
Now we are looking for builders who work with POROTON and are still located in the north – which is why I am reaching out to this forum, as it is very difficult to find out how companies actually build.
IN SHORT: Who builds with POROTON in the north and can provide us with a contact?
Thank you very much in advance,
Chrischan