no they are not. how about building codes, are they unconstitutiuonal too?
you are nuts, with all due respect. there is no constitutional right for my neighbor turning their house into a garbage dump or porno theater, and I don't want them to be able to conduct construction that causes their home to blow up or catch on fire. however, that does not mean I think the government can exercise eminent domain against my neighbor home just because they want to. these are two totally different issues.