Construct new T-shaped office building centered at the rear of Knollwood, and linked through recent back porch addition. New building will be raised basement, brick veneer on ground floor, with one over one double hung clad windows forming ribbon band on second story, hip roof with standing seam metal anodized roof, with transparent hyphen connection between historic and new buildings. Addition will not project beyond sides of Knollwood, and will be lower that roofline of historic house, so it will not be visible from Kingston Pike or approach to historic house, with complimentary materials in contemporary style.