“People are going to go – my house couldn’t have gone up that much,” Brownlee said. Values in El Paso County saw similar increases of between 15 and 20 percent, according to county assessor Steve Shleiker. Assessments homeowners are getting in the mail now don’t even include the runaway rise in home prices over the last 10 months. The appraisal period ran from January 2019 through June 2020. In the Denver metro, median property values are up more than 17 percent since last June, according to the realtor association, which would be on top of assessments arriving in mailboxes this month. Low interest rates and a shortage of homes for sale is driving price gains across the U.S. In Colorado, the number of homes on the market has been at record lows since last summer, leading to bidding wars and locking a growing number of would-be first-time homebuyers out of the market.