Research

Research
We recently completed work on a small contract with Oregon’s Department of Environmental Quality (DEQ) and Department of Land Conservation and Development (DLCD) to do case studies of several space-efficient housing types, including cottage clusters, accessory dwelling units, corner duplexes, and internal divisions of existing homes. A short synopsis of the project is summarized below.  The full report can be downloaded here, and a presentation Eli and Madeline gave on it (at a Metro Regional Government “Lunch & Learn” session) can be viewed here.

Triplex

Portland Triplex

Corner Duplex

Corner Duplex

Accessory Dwelling Unit

Accessory Dwelling Unit

Greenwood Avenue Cottages (Ross Chapin)

Greenwood Avenue Cottages (Ross Chapin)

Background
For several years, DEQ has been researching and documenting the environmental benefits of space-efficient single family housing models. In some cases, the research has identified zoning code barriers to housing types such as accessory dwelling units, cottage clusters, and other housing models. Meanwhile, the State of Oregon’s Transportation and Growth Management Program (TGM), which is a partnership between DLCD and the Oregon Department of Transportation (ODOT), has been supporting communities across the state in their transportation and land use planning efforts by providing aid to communities to expand transportation options for people, including promoting efficient use of urban land. In part, TGM supports communities through the Model Development Code for Small Cities and associated technical assistance to local jurisdictions. The Model Development Code is primarily used by small cities of fewer than 25,000 people, but can also serve as a buffet of options for larger cities. This project represents an opportunity for DEQ research to support TGM’s future updates to the Model Development Code. Specifically, DEQ is providing research and case studies to demonstrate best practices from development codes and built examples of space efficient housing in Oregon and elsewhere.

Purpose
We will be developing a summary report highlighting case studies of built space-efficient housing models and the local codes that support or block them. The case studies will include lessons learned, actual code language that was supportive or limiting for the project, best practices recommended by any of the project developers, feedback from the current occupants (when possible), and pictures of the completed project. The final report will be a resource that can be utilized by TGM for future Model Development Code updates to support a broader palette of housing options, including potential new ones that provide significant environmental and transportation benefits. The report will also be available to other planning authorities interested in supporting space-efficient housing options through zoning code practices that have resulted in successfully built projects.