The Adam Thoroughgood House is a National Historic Landmark and is possibly the oldest surviving colonial home in Virginia Beach, Virginia.  The brick house, located within the neighborhood of Thoroughgood, was at one time thought to have been built in 1636, but recent research has placed its construction circa 1719.  Much of the current structure was most likely the house of the great-grandson of Adam Thoroughgood.  It is one of the oldest houses from early Colonial period and provides insight into the kind of lifestyle lived by the gentry in Princess Anne County, Virginia.  The building underwent major restorations in 1923 and in the 1950’s and has served as a museum since opening to the public April 29, 1957.  The City of Virginia Beach acquired the property in 2003 and commissioned PACE Collaborative’s engineers to assess the buildings mechanical, electrical, and plumbing systems.  Following the assessment, PACE Collaborative provided the mechanical and electrical design services for renovations and system replacements to the house.  The designs included a multi-zone geothermal HVAC system, dehumidification, new DDC controls that integrate with the citywide network, and new LED light fixtures with low UV to protect historic artifacts.  This project also required extensive coordination with Historic Preservation Architectural and Engineering consultants.