I think it is only Houston that has no zoning laws.
In old cities, that pre-date zoning laws, mansions exist side-by-side with shacks--the poor with the rich--minority types with majority types--etc.
In conformist communities, everything and everyone tends to have an oppressive, boring sameness, including archetecture.
When I bought my present home--in The Middle of Nowhere--I made sure that I had enough land surrounding my family and me to protect us from this kind of oppression, and I refused all binding covenants (except that I--reluctantly--agreed not to establish a trailor park on the property, not that I had any intention of doing that, which is why I finally agreed).
Look at Leftist enclaves. They DEMAND CONFORMITY! In every way. Just as they preach "diversity".
Leftists love to proclaim themselves "liberal". They are the opposite. Their thinking is as sloppy and lazy as their morality. What they mistake for "liberalism" is iconoclasm; it has nothing to do with liberalism, open-mindedness, freedom of thought or opinion, or the free exchange of ideas.
The basic evil behind Decadence and the Left is mendacity. They cannot be truthful. If they were, they could not be Leftists.
In this respect--and some others as well--The Left is like a religion. It starts with conclusions and makes everything else fit them.