So I am working with my co-workers to revamp our fair City's zoning code. One of the discussions we are having is how to best control residential density. My supervisor is wanting to define the zoning districts based on dwelling units per acre (net density, after removing ROW's and Common Areas). I am in the camp of wanting to use lot area to define the zoning district, mainly due to my experience of using similar regulations in other communities. Are there any best practices? Any problems with using one method versus the other?