| Docomomo South Africa |
| Friends of Horwoods Farm |
| 1820 Settlers Community Group |
| Vernacular Architecture Society of South Africa (VASSA) |
| National Heritage Council (NHC) |
| South African Heritage Resource Agency (SAHRA) |
| Association of Professional Heritage Practitioners (APHP) |
| Southern Suburbs Heritage Society |
| Pretoria Institute for Architecture (PIA) |
| Gauteng Institute for Architecture (GIfA) Heritage Committee |
| Kensington Heritage Trust |
| Kensington Residents and Ratepayers Association (KRRA) |
| Greenside Residents Association (GRA) |
| Norwood Orchards Residents Association (NORA) |
| Arcadia Residents and Ratepayers Association (ARRA) |
| Parktown North Residents Association (PNRA) |
| Heritage Association of South Africa (HASA) |
| Johannesburg Heritage Foundation (JHF) |
| Provincial Heritage Resources Authority Gauteng (PHRAG) |
