| 1 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 85 m² | £160,000 (2019) |
| 1 Red Sails, Lon Isallt, Treaddur Bay, Holyhead | Leasehold | 148 m² | £249,950 (2019) |
| 2 Red Sails, Lon Isallt, Treaddur Bay, Holyhead | Leasehold | 131 m² | £203,000 (2014) |
| 6 Isallt Lodges, Trearddur Bay, Holyhead | - | 63 m² | - |
| 6 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 87 m² | £200,000 (2022) |
| 7 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 77 m² | £225,000 (2024) |
| 8 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 90 m² | £155,000 (2018) |
| 14 Isallt Lodges, Trearddur Bay, Holyhead | - | 68 m² | - |
| 21 Plas Darien Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 90 m² | £195,000 (2021) |
| 22 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | - | 84 m² | - |
| 23 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 81 m² | £185,000 (2023) |
| 24 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 50 m² | £152,500 (2021) |
| 25 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 53 m² | £173,000 (2023) |
| 27 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 79 m² | £180,000 (2023) |
| 28 Plas Darien, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 85 m² | £117,500 (2018) |
| 47 Trearddur Holiday Bungalows, Lon Isallt, Trearddur Bay, Holyhead | - | 58 m² | - |
| Bay View, Lon Isallt, Trearddur Bay, Holyhead | - | 270 m² | - |
| Cartref, Lon Isallt, Trearddur Bay, Holyhead | - | 146 m² | - |
| Charay, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 174 m² | £320,000 (2018) |
| Darien Bach, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 126 m² | £172,500 (2007) |
| Drummond, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 130 m² | £442,000 (2014) |
| Flat 1 Gwynfa, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 98 m² | £160,000 (2014) |
| Flat 2 Gwynfa, Lon Isallt, Trearddur Bay, Holyhead | - | 99 m² | - |
| Flat 2, The Headlands, Lon Isallt, Holyhead | - | 69 m² | - |
| Flat 3 Gwynfa, Lon Isallt, Trearddur Bay, Holyhead | Leasehold | 100 m² | £195,000 (2013) |
| Flat 3 Plas Darien, Lon Isallt, Holyhead | Leasehold | 85 m² | £232,500 (2024) |
| Flat 3 The Headlands, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 65 m² | £140,000 (2011) |
| Flat 4, The Headlands, Lon Isallt, Holyhead | Leasehold | 62 m² | £200,000 (2021) |
| Fron Isallt, Lon Isallt, Trearddur Bay, Holyhead | - | 176 m² | - |
| Glasfor, Lon Isallt, Trearddur Bay, Holyhead | - | 148 m² | - |
| Min Y Mor, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 189 m² | £265,000 (2011) |
| Montcalm, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 113 m² | £215,000 (2013) |
| Morlais, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 277 m² | £650,000 (2016) |
| Nyth Y Wylan, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 159 m² | £240,000 (2013) |
| Periwinkle, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 115 m² | £218,000 (2012) |
| Porth Ewyn House, Lon Isallt, Trearddur Bay, Holyhead | - | 97 m² | - |
| Porth Ewyn, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 87 m² | £150,000 (2024) |
| Porth Yr Afon, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 152 m² | £412,000 (2014) |
| Red Sails, Lon Isallt, Trearddur Bay, Holyhead | Freehold | 178 m² | £249,950 (2014) |
| The Cottage, Lon Isallt, Trearddur Bay, Holyhead | - | 49 m² | - |
| Ty Ganol Isallt Bach, Lon Isallt, Trearddur Bay, Holyhead | - | 62 m² | - |
| Ty Newydd Isallt Bach, Lon Isallt, Trearddur Bay, Holyhead | - | 63 m² | - |
