Divide and conquer. That’s what Washington builder Tom Glass had to do with the massive, time-sensitive renovation and remodeling of a 19th-century, 8,150-square-foot house located in the heart of Georgetown, a neighborhood that is under the jurisdiction of several historic preservation boards and fine arts committees.

“We work on two tracks at the same time,” says Glass. “It’s really the exterior that the ­historic review boards are interested in, so we go ahead and apply for those reviews while we’re doing demolition and structural framing on the interior. We start out with a demolition permit and then move on to a structural repair permit, where the city will allow us to do structural alterations to the interior only.”

Glass had just one year to pull off this daunting project, which included construction of a new 1,536-square-foot addition, a complete renovation of the interior and exterior (all the while maintaining historic features), an innovative stair system, and five new zones of heating and cooling.

CATEGORY: Whole-house makeover or significant addition
ENTRANT/BUILDER: Glass Construction, Washington
ARCHITECT: Christian Zapatka Architect, Washington

Learn more about markets featured in this article: Washington, DC.