(Source: District of Columbia Department of Consumer and Regulatory Affairs) (WASHINGTON, DC) — Mayor Vincent C. Gray announced today that the District of Columbia will adopt the 2013 DC Construction Codes this Friday, March 28, 2014. The new codes reflect some of the most modern, sustainable, and energy- and water-efficient building practices, and will replace the District’s 2008 Construction Codes. By adopting the 2013 DC Green Construction Code and the 2013 DC Energy Conservation Code as mandatory codes applicable to public- and private-sector buildings, the District has achieved a national…