The "missing middle" opens lines of communication about diverse housing choices that are compatible in form and scale with detached, single-family homes in walkable neighborhoods.

The mismatch between current US housing stock and shifting demographics, combined with the growing demand for walkable urban living, has been poignantly defined by recent research and publications by the likes of Christopher Nelson and Chris...

Your city or state just allowed—or is considering allowing—multiple units on every lot. Here are six tips for successful implementation of the Missing Middle.