| Company | Timeline | Status | |
| HGP Holdings Limited Director • Chartered Architect | 3 Apr 2008←2 Years 3 Months→28 Jul 2010 | Dissolved | |
| Greentree Allchurch Evans Limited Director • Architect | 8 May 2000←10 Years→28 Jul 2010 | Dissolved | |
| HGP Architects Limited Director • Chartered Architect | 22 Oct 1992←17 Years→28 Jul 2010 | Active | |
Hawthorne Kamm Limited Director • Chartered Architect | 4 Jan 1992←9 Years→31 Mar 2001 | Dissolved | |
