Hallmark is an addition to a low slung ranch house in Dallas. The owners wanted a master suite that would become a sanctuary within the house. The addition creates a U-shaped arrangement that opens onto the back yard. The existing deck was removed and a new deck is configured to encourage outdoor living. The deck and a new soffit edge unify the new and old sections of the house. Wood slats screen the existing carport and a similar trellis shades the master suite.