| 1 Denefield House, 27 Portland Street, Southport | - | 46 m² | - |
| 1 Lowood Court, 24 Portland Street, Southport, Southport | - | 57 m² | - |
| 2 Denefield House, 27 Portland Street, Southport | - | 56 m² | - |
| 3 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 3 Lowood Court, 24 Portland Street, Southport, Southport | - | 48 m² | - |
| 4 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 4 Lowood Court, 24 Portland Street, Southport, Southport | - | 49 m² | - |
| 5 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 5 Lowood Court, 24 Portland Street, Southport, Southport | - | 57 m² | - |
| 6 Denefield House, 27 Portland Street, Southport | - | 61 m² | - |
| 6 Lowood Court, 24 Portland Street, Southport, Southport | - | 57 m² | - |
| 7 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 7 Lowood Court, 24 Portland Street, Southport, Southport | - | 49 m² | - |
| 8 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 8 Lowood Court, 24 Portland Street, Southport, Southport | - | 57 m² | - |
| 9 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 9 Lowood Court, 24 Portland Street, Southport, Southport | - | 57 m² | - |
| 10 Denefield House, 27 Portland Street, Southport | - | 71 m² | - |
| 10 Lowood Court, 24 Portland Street, Southport, Southport | Freehold | 57 m² | £1,778,013 (2019) |
| 11 Denefield House, 27, Portland Street, Southport | - | 60 m² | - |
| 12 Denefield House, 27 Portland Street, Southport | - | 68 m² | - |
| 31, Portland Street, Southport | - | 113 m² | - |
| 31A Portland Street, Southport | - | 102 m² | - |
| 33A, Portland Street, Southport | Freehold | 172 m² | £385,000 (2019) |
| 35, Portland Street, Southport | Freehold | 95 m² | £158,000 (2003) |
| 37, Portland Street, Southport | - | 99 m² | - |
| 37A, Portland Street, Southport | - | 90 m² | - |
| 37B Portland Street, Southport | - | 98 m² | - |
| 41A Portland Street, Southport | Freehold | 251 m² | £385,000 (2024) |
| Flat 1, 22A Portland Street, Southport | Leasehold | 79 m² | £107,000 (2022) |
| Flat 1, 33 Portland Street, Southport | - | 44 m² | - |
| Flat 1, 35 Portland Street, Southport | Leasehold | 99 m² | £195,000 (2025) |
| Flat 1, 39 Portland Street, Southport | Leasehold | 93 m² | £106,300 (2005) |
| Flat 2, 22A, Portland Street, Southport | Leasehold | 74 m² | £88,000 (2014) |
| Flat 2, 33 Portland Street, Southport | - | 43 m² | - |
| Flat 2, 35 Portland Street, Southport | Leasehold | 66 m² | £110,500 (2025) |
| Flat 2, 39 Portland Street, Southport | - | 79 m² | - |
| Flat 2, Lowood Court, 24 Portland Street, Southport | - | 53 m² | - |
| Flat 3, 22A, Portland Street, Southport | Leasehold | 88 m² | £115,000 (2024) |
| Flat 3, 33 Portland Street, Southport | - | 32 m² | - |
| Flat 3, 35 Portland Street, Southport | Leasehold | 37 m² | £55,000 (2020) |
| Flat 3, 39 Portland Street, Southport | Leasehold | 91 m² | £107,112 (2005) |
| Flat 4, 22A, Portland Street, Southport | Leasehold | 86 m² | £240,000 (2006) |
| Flat 4, 33 Portland Street, Southport | - | 56 m² | - |
| Flat 5, 22A, Portland Street, Southport | Leasehold | 113 m² | £117,000 (2009) |
| Flat 6, 22A, Portland Street, Southport | Leasehold | 84 m² | £103,500 (2017) |
| Nav-Comm Electronics, Portland Hall, 41 Portland Street, Southport | Freehold | 764 m² | £21,000 (1996) |