Using the increase in average new and existing home prices in Seattle between 2010 and 2017 as a base, we’ve projected the potential impact of Amazon in 16 of the 20 cities being considered for HQ2. (For a more comprehensive picture of the housing market in each city, we pulled Metrostudy data by CBSA. New York City and Newark are represented as one market, and Washington, D.C., Montgomery County, Md., and Northern Virginia are combined as well, accounting for 16 cities on the shortlist instead of 20, but representative of the market as a whole.)