| 78, Courtenay Avenue, Harrow | - | 73 m² | - |
| 80, Courtenay Avenue, Harrow | - | 70 m² | - |
| 82 Courtenay Avenue, Harrow | - | 70 m² | - |
| 84 Courtenay Avenue, Harrow | - | 66 m² | - |
| 86 Courtenay Avenue, Harrow | - | 72 m² | - |
| 88 Courtenay Avenue, Harrow | Freehold | 120 m² | £130,000 (2001) |
| 90 Courtenay Avenue, Harrow | Freehold | 72 m² | £196,500 (2005) |
| 92 Courtenay Avenue, Harrow | Freehold | 69 m² | £196,000 (2009) |
| 94 Courtenay Avenue, Harrow | - | 72 m² | - |
| 96 Courtenay Avenue, Harrow | - | 59 m² | - |
| 100, Courtenay Avenue, Harrow | Freehold | 110 m² | £192,500 (2010) |
| 102 Courtenay Avenue, Harrow | - | 66 m² | - |
| 104 Courtenay Avenue, Harrow | Freehold | 101 m² | £97,000 (2003) |
| 106, Courtenay Avenue, Harrow | Freehold | 63 m² | £326,000 (2018) |
| 108 Courtenay Avenue, Harrow | - | 65 m² | - |
| 114 Courtenay Avenue, Harrow | Freehold | 75 m² | £417,000 (2024) |
| 116, Courtenay Avenue, Harrow | Freehold | 73 m² | £88,500 (1999) |
| 118, Courtenay Avenue, Harrow | Freehold | 69 m² | £299,000 (2015) |
| 120 Courtenay Avenue, Harrow | - | 72 m² | - |
| 122 Courtenay Avenue, Harrow | Freehold | 69 m² | £420,000 (2023) |
| 124 Courtenay Avenue, Harrow | - | 72 m² | - |
| 126, Courtenay Avenue, Harrow | - | 65 m² | - |
| 128 Courtenay Avenue, Harrow | Freehold | 67 m² | £66,750 (1997) |
| 130, Courtenay Avenue, Harrow | Freehold | 69 m² | £368,000 (2020) |
| 132 Courtenay Avenue, Harrow | Freehold | 66 m² | £126,000 (2000) |
| 134, Courtenay Avenue, Harrow | Freehold | 74 m² | £83,000 (1998) |
| 136 Courtenay Avenue, Harrow | - | 74 m² | - |
| 138 Courtenay Avenue, Harrow | - | 75 m² | - |
| 142, Courtenay Avenue, Harrow | - | 67 m² | - |
| 144, Courtenay Avenue, Harrow | - | 101 m² | - |