You will have to hire someone to come by, take a look at the matter, and prepare an expert report.
OK. I had hoped that maybe a ruling already existed so that one could present something to the authorities without directly hiring someone. But after reading this here, there doesn’t seem to be anything on that.
I actually asked myself that question as well. Our general contractor didn’t get the selected bricks, so they ended up using ones with a glossy engobe. When I saw how shiny they were, I asked my GC the same question. We also have a clause like that in the development plan. I was told that it only intends to exclude glazed bricks.
The problem here is that the general contractor interprets it that way. Whether that is actually the case, I am trying to clarify. If glazed bricks are really to be excluded, then it should say glazed bricks, not "non-matte or non-reflective." I once heard it’s because of the airplane flight zone, but so far that doesn’t seem to be true. Another rumor says it’s because of the birds. But I don’t have an opinion on that yet.
Anyway, I called our responsible building authority (in NRW) because of this, and the information was: Submit an application for someone to come, inspect, and take photos. Then it will cost you money for the guy who comes, and if he arrives on a cloudy day, then you won’t see that it causes glare, so your request will be rejected. Oh, and of course you will be considered the biggest nuisance in the neighborhood because you went to the authorities...
With us, the city tries to strictly dictate practically everything to ordinary builders. Usually also verbally and vaguely. Then one wonders why investors and others are allowed to build differently, and then you are told that the city didn’t actually want that, but then they threatened with a lawyer briefly and boom, it was allowed. I find it, well, problematic to build that pressure so that you then become the nuisance of the neighborhood. I can understand it somewhat, but in our case it is a house that doesn’t follow any rules anywhere and the builder has already annoyed all neighbors. If everyone else follows the rules, why should you be the nuisance if you stand up against those who abuse the situation?
Our neighbors have high gloss roof tiles, even though the development plan prohibits them, in black, really tacky. But the rest of us in the street don’t say anything, it’s a matter of taste and it doesn’t blind me. His solar panels reflect much more in my opinion, and every building official likes that.
If it didn’t blind anyone, I wouldn’t care either. But do solar panels really reflect more? I’ve never noticed a solar panel reflecting? That would actually be bad for the panel if the light was reflected.
Throw bags of flour and paste on the roof at night?
:-)