Affordably priced apartments large enough for families could sprout from the site of the soon-to-be-vacated headquarters of the Colorado Department of Transportation in southeast Denver. Those plans are part of a complex, $19.3 million deal negotiated by city officials for private development of two CDOT administration properties in the area that the state agency plans to abandon in early 2018, when it opens a new headquarters in West Denver. The Kentro Group, a commercial developer, is making plans for the construction of at least 425 apartments between the two sites in the next few years. In essence, the city has midwifed a deal for Kentro that comes with strings attached, including the affordable housing component. It prevailed in a competition involving 15 developers and will pay the full costs to buy the purchases, according to details spelled out in documents filed Thursday in advance of a City Council hearing next week. “Closing is anticipated to be mid-2018,” said Courtney Law, a spokeswoman for the city’s Department of Finance. Kentro is working on plans for 150 units of affordable housing on the 12-acre CDOT headquarters site as well as retail and commercial components, the documents say. To qualify, tenants will have to fall under income limits that include $50,340 a year for a family of four. Provided by Google MapsThe Colorado Department of Transportation’s headquarters is shown at upper left, and the Region 1 building is at right. On the nearby 11-acre site of CDOT’s Region 1 office, the developer envisions 225 units of market-rent apartments and 50 to 80 apartments reserved for older tenants, called “senior housing.” Across both sites, Law wrote in an email, “the developments are expected to have a combination of 2-3 bedroom walk-up units. The senior housing is anticipated to be some level of assisted living.” CDOT’s current headquarters is at 4201 E. Arkansas Ave., near Colorado Boulevard. The Region 1 office is at 2000 S. Holly St., near Evans Avenue. Both are in or adjacent to Denver’s Virginia Village neighborhood. “As you would imagine, such projects can either be wonderful additions or difficult” for a neighborhood, said Councilman Paul