| 71 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 72, Treseifion Estate, Holyhead | - | 770 m² | - |
| 73, Treseifion Estate, Holyhead | - | 770 m² | - |
| 74, Treseifion Estate, Holyhead | - | 770 m² | - |
| 76, Treseifion Estate, Holyhead | - | 770 m² | - |
| 77, Treseifion Estate, Holyhead | - | 770 m² | - |
| 78, Treseifion Estate, Holyhead | - | 770 m² | - |
| 79 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 80, Treseifion Estate, Holyhead | - | 72 m² | - |
| 81, Treseifion Estate, Holyhead | - | 770 m² | - |
| 82 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 83 Treseifion, Caergybi, Ynys Mon | - | 112 m² | - |
| 84 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 85, Treseifion Estate, Holyhead | - | 86 m² | - |
| 86, Treseifion Estate, Holyhead | - | 86 m² | - |
| 87, Treseifion Estate, Holyhead | - | 86 m² | - |
| 88 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 89 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 90, Treseifion Estate, Holyhead | - | 86 m² | - |
| 91 Treseifion, Caergybi, Ynys Mon | - | 88 m² | - |
| 92 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 93 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 94, Treseifion Estate, Holyhead | - | 86 m² | - |
| 95, Treseifion Estate, Holyhead | - | 88 m² | - |
| 96 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 97, Treseifion Estate, Holyhead | Freehold | 89 m² | £40,000 (2002) |
| 98, Treseifion Estate, Holyhead | - | 87 m² | - |
| 99, Treseifion Estate, Holyhead | - | 90 m² | - |
| 100 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 101 Treseifion, Caergybi, Ynys Mon | - | 84 m² | - |
| 102 Treseifion Estate, Holyhead | Freehold | 90 m² | £135,000 (2024) |
| 103 Treseifion, Caergybi, Ynys Mon | - | 92 m² | - |
| 104 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 104A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 105 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 105A, Treseifion Estate, Holyhead | - | 70 m² | - |
| 106 Treseifion, Caergybi, Ynys Mon | - | 67 m² | - |
| 106A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 107 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 107A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 108, Treseifion Estate, Holyhead | - | 73 m² | - |
| 108A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 109 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 109A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 110 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 110A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 111 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 111A Treseifion, Holyhead, Ynys Mon | Leasehold | 70 m² | £59,000 (2013) |
| 112 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 112A Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 113 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 114 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 115 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 116, Treseifion Estate, Holyhead | - | 68 m² | - |
| 117 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 118 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 119 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 120 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 121, Treseifion Estate, Holyhead | - | 69 m² | - |
| 122 Treseifion, Caergybi, Ynys Mon | - | 70 m² | - |
| 123 Treseifion, Caergybi, Ynys Mon | - | 118 m² | - |
| 127, Treseifion Estate, Holyhead | Freehold | 99 m² | £106,000 (2007) |
| 129, Treseifion Estate, Holyhead | - | 90 m² | - |
| 130 Treseifion Estate, Holyhead | Freehold | 88 m² | £20,000 (1995) |
| 131, Treseifion Estate, Holyhead | - | 87 m² | - |
