The problem isn’t the zoning. That can be fixed with literally a stroke of a pen. The problem is that the buildings were never designed for habitation, and so y

The problem isn’t the zoning. That can be fixed with literally a stroke of a pen. The problem is that the buildings were never designed for habitation, and so you run into issues with plumbing and windows. Sometimes these things are fixable, but usually at great cost, especially for newer construction.