downzoning
noun [ U ]
US uk/ˈdaʊnzəʊnɪŋ/ us GOVERNMENT
the decision to limit the number or size of buildings on an area of land, or to limit the type of business or activities that can take place there:
The study showed that downzoning had actually hurt farmers, not helped them.
downzone
verb [ I or T ] US
Current efforts to downzone may have come too late to protect targeted neighborhoods.