Retired practitioner David Walton, 70, of Ponteland, died in tragic circumstances last Wednesday while working on a project to build a new house for his family in the north-eastern county.
Police are not treating his death as suspicious, although at about 11.30am - minutes before the accident - a gold-coloured Rover left the scene. The authorities are calling on anyone who may have visited the home in Edge Hill, Darras Hall around this time to come forward.
In 1989, Walton worked on designs for Newcastle's Royal Victoria Infirmary and in the past year reached the second round of a local regeneration project with designs for sustainable housing.
Since Walton's death, the full tragic details of his latter-day life have emerged. His wife Pat died of breast cancer in 1995 and his son, Sam, was killed in a motorcycle accident in 2000.