Note, however, the number of units under construction and proposed in Denver County. This reflects the central city’s growing population, especially as an urban lifestyle becomes more appealing to younger tenants and to “lifestyle” renters. This is quite a turnabout from recent history when suburban construction trumped urban development. In Denver this trend is seen in downtown and along some of the RTD rail transit corridors. Transit-oriented development has certainly come of age in Denver and is likely to accelerate with the completion of several new lines. To track development activity JRES uses a combination of sources, including Pierce-Eislen and our own field research. As mentioned above, developers.