| 91, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £254,995 (2018) |
| 93, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £307,000 (2025) |
| 95, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 93 m² | £357,500 (2023) |
| 97, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £300,000 (2018) |
| 99, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £296,995 (2018) |
| 101, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £402,500 (2024) |
| 103, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £296,995 (2018) |
| 105, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £184,995 (2018) |
| 107, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £184,995 (2018) |
| 109, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 71 m² | £255,000 (2021) |
| 111, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 71 m² | £217,995 (2018) |
| 113, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £190,000 (2021) |
| 115, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £227,500 (2022) |
| 117, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 71 m² | £287,500 (2025) |
| 119, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £195,000 (2021) |
| 121, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £220,000 (2024) |
| 123, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 71 m² | £219,995 (2018) |
| 125, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £254,995 (2018) |
| 127, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £254,995 (2018) |
| 129, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £330,000 (2021) |
| 131, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £300,000 (2019) |
| 133, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 90 m² | £278,000 (2018) |
| 135, Mortimer Avenue, Old St. Mellons, Cardiff | - | 93 m² | - |
| 137, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 93 m² | £284,995 (2018) |
| 139, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £255,000 (2026) |
| 141, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £189,995 (2018) |
| 143, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £233,000 (2022) |
| 145, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £178,000 (2018) |
| 147, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 59 m² | £189,995 (2018) |
| 149, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £250,000 (2018) |
| 151, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £312,000 (2022) |
| 153, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 102 m² | £304,995 (2018) |
| 155, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 102 m² | £304,995 (2018) |
| 157 Mortimer Avenue, Old St Mellons, Cardiff, Cardiff | Freehold | 99 m² | £259,995 (2021) |
| 159 Mortimer Avenue, Old St Mellons, Cardiff, Cardiff | Freehold | 99 m² | £259,995 (2021) |
| 161 Mortimer Avenue, Old St Mellons, Cardiff | Freehold | 71 m² | £229,995 (2021) |
| 163 Mortimer Avenue, Old St Mellons, Cardiff | Freehold | 71 m² | £229,995 (2021) |
| 165, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £219,995 (2019) |
| 167, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £213,995 (2020) |
| 169, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 71 m² | £219,995 (2019) |
| 171, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 71 m² | £300,000 (2022) |
| 173, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £214,995 (2020) |
| 175, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £260,000 (2024) |
| 177, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £275,000 (2024) |
| 179, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £290,000 (2025) |
| 181, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £317,500 (2025) |
| 183, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £254,995 (2020) |
| 185, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £299,000 (2026) |
| 187, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £265,000 (2024) |
| 189, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 113 m² | £300,000 (2019) |
| 191, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £217,995 (2020) |
| 193, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £285,000 (2025) |
| 195, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £217,995 (2019) |
| 197, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 94 m² | £285,000 (2024) |
| 199, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £289,950 (2023) |
| 201, Mortimer Avenue, Old St. Mellons, Cardiff | Freehold | 99 m² | £315,000 (2025) |