| Company | Timeline | Status | |
| John Roberts Architects (CDM) Limited Director • Architect | 3 Dec 1991←17 Years→1 Sep 2009 | Dissolved | |
| John Roberts Architects Limited Director • Architect | 9 Nov 1991←15 Years→1 Nov 2007 | Liquidation | |
| John Roberts Associates Design And Planning Consultants Limited Director • Architect | 4 Jun 1991←10 Years→30 Nov 2001 | Active | |
