Quantitative Classification of Neighbourhoods: The Neighbourhoods of New Single-family Homes in the Portland Metropolitan Area

This paper develops a quantitative method for classifying neighbourhood types and applies the characterizationmethod to the neighbourhoods of new single-family homes in the Portland, Oregon, metropolitan area. The study first measures a set of 21 urban form attributes in neighbourhoods that contain newly constructed single-family homes. Factor analysis is then used to identify a small set of dimensions that capture essential differences in urban form. Finally, these factor scores are used as input to a cluster analysis to identify distinct neighbourhood types. The results demonstrate that most new single-family homes in Portland are built in newsuburban neighbourhoods, but a substantial portion of single-family construction is occurring in traditional and neo-traditional urban neighbourhoods.