A home for sale in metro Denver in 2015.Helen H. Richardson, The Denver Post Metro Denver continues to see home-price gains running at or near double-digit rates, but three separate surveys indicate apartment rents have downshifted into a more sustainable rate. As of May, apartment rents are up 3.4 percent over the past year and 0.3 percent between May and June, according to Apartment List, a San Francisco-based website. Apartment List’s rent survey is based on the listings available on its website, which includes apartment developers offering discounts to win tenants to new projects. Based on the listings, the median one-bedroom rent in Denver is $1,340 a month and $1,760 for two-bedrooms. Apartment List has Boulder apartment rents increasing at a 2.8 percent annual rate in June; Broomfield at 3.2 percent; Thornton at 5.3 percent; Aurora at 5.8 percent; and Arvada leading the way with a 12.3 percent increase.