Pathways to Increasing Housing Stock during a Monster Home Moratorium

We've heard a lot of discussion and proposals on ways to curtail the construction of large residential structures, or "Monster Homes", over the past year.  Proponents of these large structures argue that they are meeting a community need by increasing housing stock in a manner that makes it affordable for multiple families to combine resources and build a shared home or accommodate multiple generations on one property.  Opponents of the structures argue they are a blight to established residential neighborhoods and disproportionately consume public resources such as parking, sewer capacity, and view corridors.

Enter "Missing Middle Housing".  Rather than focusing on maximizing the size of houses on single family residential lots, a more appropriate solution could come from planned increases in density through rezoning.  A gradual increase in density through multifamily housing types as indicated in the image below creates a harmonious transition from single family residential areas to commercial areas and higher density urban living environments.  Such an approach would require coordination from traffic, water, sewer, and zoning branches just to name a few.  However, with a collaborative effort, rezoning could be an avenue for successfully preserving single family neighborhood character in some areas while increasing housing stock and quality of life in transitional and mixed use zones. 

In lieu of simple rezoning, another approach to achieving an increase in missing middle housing is a transition to a form-based code.  Discussion of changes to the City and County of Honolulu Land Use Ordinance (ROH Chapter 21) are underway.  What changes would you like to see?