| 2, Portland Road, Irthlingborough, Wellingborough | - | 32 m² | - |
| 4, Portland Road, Irthlingborough, Wellingborough | Leasehold | 33 m² | £31,000 (2003) |
| 6, Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £70,000 (2019) |
| 8, Portland Road, Irthlingborough, Wellingborough | - | 32 m² | - |
| 10 Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £53,000 (2005) |
| 12 Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £53,000 (2016) |
| 14, Portland Road, Irthlingborough, Wellingborough | Leasehold | 33 m² | £42,000 (2012) |
| 16, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £74,000 (2022) |
| 18, Portland Road, Irthlingborough, Wellingborough | Leasehold | 23 m² | £56,000 (2007) |
| 20, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £71,000 (2025) |
| 22 Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £56,000 (2006) |
| 24 Portland Road, Irthlingborough | Leasehold | 33 m² | £65,000 (2021) |
| 26 Portland Road, Irthlingborough, Wellingborough | Leasehold | 36 m² | £51,000 (2006) |
| 28 Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £13,850 (2001) |
| 30, Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £75,650 (2022) |
| 32, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £61,000 (2017) |
| 33 Portland Road, Irthlingborough, Wellingborough | Freehold | 94 m² | £228,500 (2017) |
| 34, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £64,000 (2021) |
| 36, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £50,500 (2016) |
| 38, Portland Road, Irthlingborough, Wellingborough | Leasehold | 21 m² | £15,250 (2000) |
| 40 Portland Road, Irthlingborough, Irthlingborough | Leasehold | 31 m² | £11,100 (1997) |
| 42, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £61,000 (2017) |
| 44 Portland Road, Irthlingborough, Wellingborough | Leasehold | 30 m² | £64,500 (2018) |
| 46, Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £47,000 (2008) |
| 48 Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £28,500 (2002) |
| 50 Portland Road, Irthlingborough, Wellingborough | Leasehold | 30 m² | £70,000 (2021) |
| 52, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £72,000 (2025) |
| 54, Portland Road, Irthlingborough, Wellingborough | - | 32 m² | - |
| 56, Portland Road, Irthlingborough, Wellingborough | Leasehold | 33 m² | £64,000 (2019) |
| 58 Portland Road, Irthlingborough, Irthlingborough | Leasehold | 30 m² | £73,500 (2021) |
| 60, Portland Road, Irthlingborough, Wellingborough | Leasehold | 30 m² | £9,480 (1995) |
| 62, Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £37,000 (2003) |
| 64, Portland Road, Irthlingborough, Wellingborough | Leasehold | 33 m² | £44,000 (2015) |
| 66, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £56,000 (2007) |
| 68, Portland Road, Irthlingborough, Wellingborough | Leasehold | 31 m² | £56,000 (2007) |
| 70, Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £75,000 (2025) |
| 72, Portland Road, Irthlingborough, Wellingborough | Leasehold | 32 m² | £44,500 (2015) |
