| 1 The Great Engineering Building (Court E), Winding Wheel Lane, Penallta, Penallta | Leasehold | 73 m² | £118,000 (2026) |
| 2 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 78 m² | £135,000 (2008) |
| 3 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 53 m² | £105,000 (2026) |
| 4 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 93 m² | £107,000 (2024) |
| 5 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 73 m² | £125,000 (2024) |
| 6 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 50 m² | £110,000 (2025) |
| 7 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 80 m² | £110,000 (2025) |
| 8 Great Engineering Building, Winding Wheel Lane, Ystrad Mynach, Hengoed | Leasehold | 77 m² | £120,000 (2026) |
| 9 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | - | 80 m² | - |
| 10 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 93 m² | £112,000 (2023) |
| 11 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 76 m² | £135,000 (2024) |
| 12 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 78 m² | £97,000 (2023) |
| 13 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 93 m² | £120,000 (2009) |
| 14 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | - | 93 m² | - |
| 15 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 80 m² | £120,000 (2025) |
| 16 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 89 m² | £127,000 (2024) |
| 17 The Great Engineering Building (Court E), Winding Wheel Lane, Penallta, Penallta | Leasehold | 94 m² | £145,000 (2008) |
| 18 The Great Engineering Building, Winding Wheel Lane, Penallta, Hengoed | Leasehold | 93 m² | £128,000 (2025) |
