In 2008, Michigan’s second largest city updated their zoning to allow duplexes in previously single-family-only zones. (The amendments also allowed mixed-use development in commercial districts, and included “form-based light” provisions.) Duplexes were allowed by Special Permit on corner lots under the 2008 law. In 2018, An excerpt from the Dover zoning code. 72 Missing Middle Housing Types the City amended the new code to remove the Special Permit requirement and allow duplexes by-right.

• Next City, “A Decade without Single-Family Residential Zoning in Grand Rapids,”