Visualizations: 

 Production & Density. 

Housing Production in Portland:

Questions and Visualizations

How can we understand housing flow in Portland over the past 20 & 10 years?  
 

Well, to help answer that, we've visualized our building permit data--denoting housing production--as well as our land use review data--denoting zoning applications--over the past two decades and one decade, respectively. The data has been broken down by project size.

Understanding This Visual:

 

Look to the right for a series of stacked bar graphs showing yearly totals of project counts and new units produced in Portland. Colors indicate project size.

 

For this graph, we used our building permits dataset.

Understanding This Visual:

 

Look to the right for a series of stacked bar graphs showing yearly totals of application counts and new units/lots passing through the land use [zoning] application system. Colors indicate project size.

 

For this graph, we used our land use [zoning] dataset.

What does the production of single-family homes in Portland look like?
 

Well, to help answer that, we've visualized our building permit data--denoting housing production--as well as our land use review data--denoting zoning applications--over the past two decades and one decade, respectively. The data has been broken down by project size.

Construction of Single-Family Homes.

Understanding This Visual:

 

Look to the left for a yearly, geographic timelapse of single-family construction in Portland over the past 20 years. 

Larger dots and darker shades of purple both 

indicate greater 

development in that 

particular area.

To interact with this map, see above.

What trends can we see in housing investment in Portland over time?  
 

Well, to help answer that, we've visualized yearly totals in housing investment over time below. 

Understanding This Visual:

 

Look to the right for a simple line graph showing total yearly investment in housing in Portland. We used the building permits dataset to construct this visual. Valuations were adjusted for inflation using the Turner Building Cost Index.

Hover over the graph to view particular points.

 
 
 

Insights

Understanding This Section:

 

In the process of analyzing, visualizing, and presenting this data--we have learned a lot . Below are some of the most salient insights we have found. 

 

We encourage you not to stop with just the insights we have below, but instead, we ask that you make use of our visualizations and try to find more.

  • Housing production and investment in Portland are cyclical; irrespective of demand
     

  • A vast majority of projects in Portland over the past 20 years have been single-family homes; with the percentage of higher density housing increasing by much less.
     

  • Single-family homes have been produced in greater quantities in North Portland and Southeast Portland over the past 20 year.
     

  • Over the past 20 years, housing production (by # of projects and/or units) is declining, even as demand has increased