IIRC Houston does not have zoning in direct sense of the word, but has a set of regulations and restrictions (e.g. on height, setbacks, parking minimums, lot sizes, etc.) that still drastically limits options for buildings.
I would expect that someone discussing this topic would be familiar with the various things Adam Smith and others have said about collusion to increase prices and related topics.
https://www.houstonpublicmedia.org/articles/housing/2023/07/...