Based on data from the MLS as compiled by Realtor.com, here is a map showing the median lot size of properties offered for sale in each state (for 2012). As we'd might guess, the patterns reflect both complex historical influences as well as current degree of urbanization:
More relevant to current debates over urban expansion and development are the median lot sizes of new homes, as compiled by the Census. Unfortunately, the data is not broken out by state, but the regional trends are nonetheless interesting and helpful:
|Outer suburbs of Hartford, CT.|
|The Villages: homes built for former residents of Hartford, CT.|
|Map by Bill Rankin.|
|Farm towns in Heibei province, east of Tangshan, China.|
Where land has little value for agriculture, we should not be surprised to see greenfield development taking lower-density forms.