 Clark focused most of his efforts on building the family business with his brother Stan in Leicestershire, having also opened "Roger Clark Cars" in Narborough in the 1970s.With all the businesses closed in the early 1990s due to the hard economic down turn, even with poor health in the mid-1990s he set-up "Roger Clark Motor Sport", which now run by his son Matt still prepares cars for others to use in rallying.His other son Olly Clark has been a competitor in the Time Attack UK series (winning the championship in 2008), Network Q Rally of Great Britain and the FIA Cup for Drivers of Production Cars.