| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| C.F.PUTTERILL LIMITED | 00347515 | 19/11/2021 | Silver |
| GOOD INTENT DEVELOPMENTS (JARVIS) LIMITED | 14617642 | 02/03/2023 | Silver |
| GROVE PROPERTIES (HARPENDEN) LIMITED | 00568087 | 19/11/2021 | Bronze |
| JARVIS CONSTRUCTION LIMITED | 00760141 | 31/08/2022 | Silver |
| JARVIS ELECTRICAL LIMITED | 01736500 | 31/08/2022 | Dissolved |
| JARVIS HARPENDEN LIMITED | 00426477 | 31/08/2022 | Silver |
| JARVIS HEATING LIMITED | 00574868 | 31/08/2022 | Dissolved |
| JARVIS LAND (STRATEGIC) LIMITED | 15845590 | 18/07/2024 | Amber |
| JARVIS M & E SERVICES LIMITED | 04104785 | 31/08/2022 | Dissolved |
| JARVIS MAINTENANCE LIMITED | 04122295 | 31/08/2022 | Dissolved |
| JARVIS PARTNERSHIP HOMES LIMITED | 11711533 | 04/12/2018 | Bronze |
| JL DEVELOPMENTS HARPENDEN LIMITED | 12043360 | 11/06/2019 | One Red Flag |
| JOHN HILL HOLDINGS LIMITED | 00606331 | 19/11/2021 | Bronze |
| RIDGEWOOD CONTRACTORS LIMITED | 07391593 | 20/11/2019 | One Red Flag |
| ROCKWELL LONDON NUMBER FIVE LIMITED | 09142454 | 11/08/2014 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| APPLEYARD (HARPENDEN) MANAGEMENT COMPANY LIMITED | 11923920 | 03/04/2019 | 01/12/2021 | Gold |
| CROMWELL HOUSE (BOXMOOR) MANAGEMENT COMPANY LIMITED | 11577301 | 19/09/2018 | 01/11/2020 | Gold |
| HOLLYBUSH MEWS MANAGEMENT COMPANY LIMITED | 11698320 | 27/11/2018 | 01/05/2021 | Amber |
| LOWER SAUNCEY WOOD MANAGEMENT COMPANY LIMITED | 13648366 | 28/09/2021 | 15/01/2024 | Not Trading |
| MELBOURNE MEWS (APARTMENTS) MANAGEMENT COMPANY LIMITED | 13163208 | 02/08/2021 | 30/09/2023 | Not Trading |
| MELBOURNE MEWS (WHEATHAMPSTEAD) MANAGEMENT COMPANY LIMITED | 13163466 | 27/01/2021 | 30/09/2023 | Not Trading |
| THE ROOKERY (OFFLEY) MANAGEMENT COMPANY LIMITED | 12092750 | 09/07/2019 | 01/05/2021 | Silver |