Four municipalities in DuPage County, Illinois were selected for study to determine the effects of zoning on housing that is affordable to low and moderate-income groups, and to suggest possible recommendations to achieve some inclusiveness by providing a wide range of housing options.Though Woodridge, Naperville and Villa Park appear to have made progress in terms of providing housing choices for low and moderate income groups, there exist some limited opportunities to increase affordable housing in these communities. Oak Brook is most exclusionary. It provides no opportunities for low and moderate-income groups that work in that community, even though it is a major employment center. This creates difficulties for entry job seekers and other low groups that want to live in these communities.The recommendations are specifically tailored to each community in terms of what the community could realistically do, in view of the limited land available for development. This study is intended to renew interest in zoning and affordable housing, and lead to zoning reforms in communities in DuPage County, Illinois. / Department of Urban Planning