| 1 Portland Avenue, Swindon | - | 72 m² | - |
| 1A Portland Avenue, Swindon | Leasehold | 69 m² | £110,000 (2012) |
| 2, Portland Avenue, Swindon | - | 100 m² | - |
| 3, Portland Avenue, Swindon | Freehold | 137 m² | £260,500 (2013) |
| 4 Portland Avenue, Swindon | Freehold | 105 m² | £234,000 (2006) |
| 7, Portland Avenue, Swindon | Freehold | 68 m² | £164,000 (2008) |
| 8 Portland Avenue, Swindon | Freehold | 131 m² | £340,000 (2024) |
| 9 Portland Avenue, Swindon | Freehold | 59 m² | £220,000 (2023) |
| 11, Portland Avenue, Swindon | Freehold | 55 m² | £166,246 (2008) |
| 12, Portland Avenue, Swindon | Freehold | 114 m² | £280,000 (2021) |
| 15, Portland Avenue, Swindon | Leasehold | 65 m² | £109,000 (2022) |
| 16, Portland Avenue, Swindon | Freehold | 99 m² | £240,000 (2020) |
| 17 Portland Avenue, Swindon | Leasehold | 61 m² | £110,000 (2022) |
| 18 Portland Avenue, Swindon | Freehold | 97 m² | £234,000 (2006) |
| 20 Portland Avenue, Old Town, Swindon, Swindon | Freehold | 93 m² | £200,000 (2006) |
| 21 Portland Avenue, Old Town, Swindon, Swindon | - | 59 m² | - |
| 22 Portland Avenue, Swindon | Freehold | 73 m² | £215,000 (2026) |
| 23 Portland Avenue, Swindon | - | 94 m² | - |
| 24 Portland Avenue, Swindon | Freehold | 72 m² | £310,000 (2022) |
| 26, Portland Avenue, Swindon | Freehold | 78 m² | £168,500 (2012) |
| 28, Portland Avenue, Swindon | Leasehold | 78 m² | £228,500 (2017) |
| 30, Portland Avenue, Swindon | Freehold | 87 m² | £252,000 (2019) |
| 32 Portland Avenue, Swindon | Freehold | 92 m² | £290,000 (2024) |
