As part of the obligations of his station, the master of "Nomini Hall" served as a vestryman and a warden of his church in Cople Parish and performed other public duties. At the age of twenty-eight he was made a member of the governor's Council. His large estate made him eligible and his wife's uncle, Thomas Bladen, supplied the influence in England necessary to secure his appointment to this highest governing body in the colony. By virtue of belonging to the Council he also served as a colonel in the militia. As was customary, he was henceforth known as Colonel or Councillor Carter. In the latter capacity, he went twice a year to Williamsburg to advise the royal governor and to sit as a member of the General Court. For a decade after 1762 he found it pleasant and convenient to live at the Capital the greater part of the time. He acquired a residence in the town and established his wife and children there. With the outbreak of the disturbances which led to the Revolution, however, he returned with his family to "Nomini Hall" where he lived during the remainder of his active years, devoting his time to the development of his estate and the promotion of his commercial interests, the rearing of his family, and the quiet enjoyment of his scholarly and cultivated tastes. Despite his many duties, he spent much time in reading and in scientific investigation. An accomplished musician, he practiced daily on some of the numerous instruments at his home. The social life of the family at "Nomini Hall" was of the most agreeable sort. Situated on a hill overlooking the Potomac and Nomini rivers, the mansion was admirably suited to the hospitable tradition of the region. A large rectangular structure of brick, covered with stucco, the great house was surrounded by more than thirty dependent structures or offices and presented an attractive and imposing appearance. The four principal offices were set off at a distance of one hundred yards from the corners of the house, and within the rectangle formed by these buildings was a long bowling green. Extensive and well-tended gardens provided agreeable promenades for members of the family and guests. One approached the mansion from the public highway through a wide avenue of poplars which terminated in a circle about the house. Viewed through this avenue from a distance, Fithian asserted, "Nomini Hall" appeared "most romantic, at the same time it does truly elegant."