Affordable Housing/Inclusionary Zoning

Inclusionary zoning

Inclusionary zoning (IZ) is an affordable housing policy tool that requires developers to set aside a portion of housing units for low- and moderate- income residents. Cities’ housing markets and the quality of housing stock varies across the US, which means the best policy approaches will be comprehensive commitments to ensuring affordable, safe, quality options for all. While IZ works best in "hot" markets to promote affordable options alongside new development, it’s an important policy for all cities to consider before demand outstrips supply. For a more detailed discussion of inclusionary zoning and affordable housing policy, see the policy brief at the bottom of this page.

Our assessment of inclusionary zoning includes information about city laws valid through June 1, 2020, including those passed but not effective until later dates.

Read Policy Brief

The state of inclusionary zoning in big US cities

out of 40 cities received a medal for inclusionary zoning policies, including gold, silver, and bronze.


Out of the nation’s 40 largest cities

  • Measuring big cities’ inclusionary zoning policies

    How did we award inclusionary zoning policy medals?

  • City has a mandatory inclusionary zoning law

  • Law requires program evaluation

  • Applies to projects of at least 10 units or less

  • Requires at least 20% of total project are affordable units

Inclusionary zoning medal table