| 55, Courtenay Avenue, Harrow | Freehold | 72 m² | £138,000 (2002) |
| 57 Courtenay Avenue, Harrow, Harrow | - | 74 m² | - |
| 63 Courtenay Avenue, Harrow | - | 80 m² | - |
| 65, Courtenay Avenue, Harrow | Freehold | 103 m² | £250,000 (2012) |
| 67, Courtenay Avenue, Harrow | Freehold | 88 m² | £365,000 (2016) |
| 69 Courtenay Avenue, Harrow | - | 67 m² | - |
| 71, Courtenay Avenue, Harrow | Freehold | 158 m² | £72,250 (2001) |
| 73 Courtenay Avenue, Harrow | - | 72 m² | - |
| 75 Courtenay Avenue, Harrow | - | 107 m² | - |
| 77 Courtenay Avenue, Harrow | - | 91 m² | - |
| 79, Courtenay Avenue, Harrow | Freehold | 69 m² | £88,000 (1998) |
| 81, Courtenay Avenue, Harrow | Freehold | 58 m² | £393,000 (2016) |
| 85, Courtenay Avenue, Harrow | Freehold | 93 m² | £205,000 (2011) |
| 87, Courtenay Avenue, Harrow | Freehold | 81 m² | £403,000 (2017) |
| 91 Courtenay Avenue, Harrow | Freehold | 67 m² | £448,000 (2024) |
| 93 Courtenay Avenue, Harrow | - | 66 m² | - |
| 95 Courtenay Avenue, Harrow | - | 69 m² | - |
| 97 Courtenay Avenue, Harrow | - | 75 m² | - |
| 99 Courtenay Avenue, Harrow | Freehold | 67 m² | £65,000 (1995) |
| 101, Courtenay Avenue, Harrow | Freehold | 69 m² | £197,000 (2005) |
| 105, Courtenay Avenue, Harrow | Freehold | 85 m² | £76,000 (1999) |
| 107, Courtenay Avenue, Harrow | - | 66 m² | - |
| 109 Courtenay Avenue, Harrow | - | 74 m² | - |
| 111 Courtenay Avenue, Harrow | - | 73 m² | - |
| 113, Courtenay Avenue, Harrow | - | 64 m² | - |
| 115, Courtenay Avenue, Harrow | - | 69 m² | - |
| 117, Courtenay Avenue, Harrow | - | 66 m² | - |
| 121, Courtenay Avenue, Harrow | Freehold | 74 m² | £77,250 (1997) |
| 123 Courtenay Avenue, Harrow, Harrow | - | 75 m² | - |
| 125 Courtenay Avenue, Harrow, Harrow | - | 69 m² | - |
| 127 Courtenay Avenue, Harrow | - | 72 m² | - |
| 129 Courtenay Avenue, Harrow | Freehold | 89 m² | £210,000 (2006) |
| 131, Courtenay Avenue, Harrow | - | 73 m² | - |
| 135 Courtenay Avenue, Harrow | Freehold | 73 m² | £60,000 (1995) |
| 137, Courtenay Avenue, Harrow | - | 69 m² | - |
| 141 Courtenay Avenue, Harrow | - | 71 m² | - |
| 143 Courtenay Avenue, Harrow | Freehold | 155 m² | £555,000 (2021) |
| 147, Courtenay Avenue, Harrow | - | 77 m² | - |
| 149 Courtenay Avenue, Harrow, Harrow | Freehold | 82 m² | £442,000 (2021) |
| 151 Courtenay Avenue, Harrow | Freehold | 79 m² | £153,000 (2001) |
| 153 Courtenay Avenue, Harrow | Freehold | 90 m² | £157,000 (2001) |
| 155, Courtenay Avenue, Harrow | Freehold | 124 m² | £220,000 (2009) |
| 157, Courtenay Avenue, Harrow | Freehold | 113 m² | £396,000 (2015) |
| 161, Courtenay Avenue, Harrow | Freehold | 102 m² | £427,101 (2018) |
| 165 Courtenay Avenue, Harrow | - | 97 m² | - |
| Flat 2, 157 Courtenay Avenue, Harrow, Harrow | Leasehold | 46 m² | £315,000 (2017) |
