| 1A, Londonderry Street, Seaham | Freehold | 66 m² | £12,500 (1997) |
| 2, Londonderry Street, Seaham | Freehold | 79 m² | £87,500 (2021) |
| 3, Londonderry Street, Seaham | Freehold | 72 m² | £57,500 (2012) |
| 5, Londonderry Street, Seaham | Freehold | 54 m² | £47,000 (2015) |
| 6, Londonderry Street, Seaham | Freehold | 89 m² | £66,000 (2018) |
| 7, Londonderry Street, Seaham | Freehold | 88 m² | £85,000 (2022) |
| 9, Londonderry Street, Seaham | - | 77 m² | - |
| 11, Londonderry Street, Seaham | Freehold | 60 m² | £140,000 (2026) |
| 14 Londonderry Street, Seaham | Freehold | 55 m² | £45,000 (2025) |
| 15 Londonderry Street, Seaham | Freehold | 57 m² | £9,000 (2001) |
| 16, Londonderry Street, Seaham | Freehold | 56 m² | £41,000 (2004) |
| 17, Londonderry Street, Seaham | - | 93 m² | - |
| 18, Londonderry Street, Seaham | Freehold | 57 m² | £45,000 (2011) |
| 21, Londonderry Street, Seaham | Freehold | 56 m² | £33,000 (2016) |
| 22, Londonderry Street, Seaham | Freehold | 91 m² | £22,500 (1998) |
| 24, Londonderry Street, Seaham | Freehold | 59 m² | £36,000 (2019) |
| 25, Londonderry Street, Seaham | Freehold | 56 m² | £32,000 (2018) |
| 27 Londonderry Street, Seaham | Freehold | 91 m² | £75,000 (2024) |
| 28, Londonderry Street, Seaham | Freehold | 99 m² | £33,000 (2020) |