Thousands of lots currently on track to become one-unit McMansions would see “missing middle” housing instead. — by Michael Andersen| Dec. 11, 2018 This article was previously published by the Sightline Institute. As cities across North America consider re-legalizing duplexes, triplexes and fourplexes in low-density residential areas, housing advocates need to start asking new questions: How many of these small, attached, relatively affordable homes will actually get…