| CompanyName | Phone | Fax | Contact |
| Infinitus Construction & Electrical | 011 023 8681 | 011 867 1433 | Earl |
| ILL Developers | 011 462 3767 | 086 684 4144 | Zanovuyo Malusi |
| IQ CONSTRUCTION | 012-811-0989 | 012-811-0988 | DANIE BISSCHOFF |
| ISO PROJECTS (PTY) LTD | 012-804-3564 | 012-804-6395 | ATT: PETER VAN DUYN |
| INDEPENDENT PROJECTS | 011-943-2900 | 011-943-2912 | ATT: LAUREL YOUNG |
| INKULU CONSTRUCTION CC | 012-321-9905 | 012-321-2948 | RIAAN |
| INVESTMENT PAVING | 011 454 6272 | 011 454 6273 | NORMAN KRAWCHUK |
| IVECON PROJECTS CC | 011 472 3154 | 011 472 4158 | SVEN IVERSON |
| INVESTBO PROPERTIES | 011-849-0847 | 011-849-0847 | MATTHEW BOSCH |
| INDUSTRIAL PLUMBERS (PTY) LTD | 011 025 3174 | 086 758 5433 | ATTENTION: DEREK ZIPP |
| INDUFLOOR (PTY) LTD | 011-466-2084 | 011-466-2608 | ATT: MR B CLATWORTHY |
| IAN BOLTON CONSTRUCTION (PTY) LTD | 011-789-3604 | 011-789-4710 | ATT: IAN BOLTON |
| IGUANA PROJECTS (PTY) LTD | 011 787 0239 | 011 787 0241 | ATT : THEO SNYMAN |
| IRONS C J CC | 012-346-4346 | 012-346-5211 | ATT: CHRIS IRONS |
| IKOTWE KONSTRUKSIE | 013-750-1200 | 013-750-1184 | ANDREAS VAN TONDER |
| INSTITUTE OF PLUMBING (SA) | 011-477-4563 | 011-477-4520 | JENNY CALMEYER |
| IMPALA PAVING PROJECTS | 011-892-5859 | 011-892-4278 | LESLIE FOUCHE |
| INYATSI CONSTRUCTION | 011 977 4600 | 086 566 8023 | IAN DONNELLY |
| IKHAYA BUILDING CONSTRUCTION | 073 438 0413 | 078 595 9023 | PETROS DUMISANE SITHONYA |
| ILUZ Brothers Waterproofing Systems | 011 262 4000/1/2 | 011 262 6664 | Ronen Barashi |
| Induna Projects | 078 999 2883 | 086 560 1660 | Anton Stoltz |