Our staff is documenting the effects on Portland’s homebuyers market as investors buy thousands of homes with cash. Add your photographs of the collection by using the hashtag #HomeSweetPDX on Instagram. Explore More of our Portland Housing Reporting

Methodology for our report on cash buyers

Here is the methodology for our reporting on home sales for cash in Multnomah County, Oregon. InvestigateWest obtained a list of 17,776 cash real estate transactions — the property address and the close of escrow date — occurring between 2006 and 2014 from Oregon Multiple Listing Service. The City of Portland’s Bureau of Technology Services matched 11,236 of the records to property ID numbers. InvestigateWest matched an additional 3,800 transactions by writing a web crawler, a simple computer program that ran property searches on MultCoPropTax.org, a website maintained by the Multnomah County Department of Assessment & Taxation. The web crawler also downloaded all sales information for each available property ID, including the buyer and seller names, the sale date and price.