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Inclusionary Zoning Inclusionary Zoning

What Makes Inclusionary Zoning Happen?

More than 500 local inclusionary zoning (IZ) programs have been implemented in communities across the country. In most cases, these IZ policies are adopted as part of a larger local strategy to expand housing options that are affordable to lower income households.  IZ policies have been adopted in a wide range of places, from big cities to suburban communities to rural areas. But what makes one community more quickly adopt an IZ policy than another community? Using a database developed in collaboration with the National CLT Network (now Grounded Solutions), researchers at NHC and the University of Maryland developed a model to explain the rate of IZ adoption in local jurisdictions across the country.  When states expressly authorize inclusionary zoning, local jurisdictions have an easier time adopting a local IZ program. Other community characteristics that are associated with adoption of a local IZ program include: higher population densities, higher shares of rent-burdened households, lower home ownership rates, and a lower share of Democratic voters. These research findings can help advocates target their education and outreach efforts as they seek to expand the number and the effectiveness of IZ programs across the country.