| 1 Birch Close, Undy, Caldicot | Freehold | 61 m² | £165,000 (2017) |
| 2 Birch Close, Undy, Caldicot | Freehold | 65 m² | £129,000 (2004) |
| 4, Birch Close, Undy, Caldicot | Freehold | 76 m² | £280,000 (2022) |
| 5, Birch Close, Undy, Caldicot | Freehold | 62 m² | £215,000 (2021) |
| 6 Birch Close, Undy, Caldicot | Freehold | 64 m² | £46,000 (1995) |
| 7 Birch Close, Undy, Caldicot | Freehold | 63 m² | £150,000 (2012) |
| 8, Birch Close, Undy, Caldicot | Freehold | 64 m² | £51,000 (1999) |
| 9 Birch Close, Undy, Caldicot | Freehold | 61 m² | £277,000 (2022) |
| 11, Birch Close, Undy, Caldicot | Freehold | 73 m² | £157,000 (2009) |
| 12, Birch Close, Undy, Caldicot | Freehold | 56 m² | £145,500 (2017) |
| 13, Birch Close, Undy, Caldicot | Freehold | 61 m² | £125,000 (2012) |
| 17, Birch Close, Undy, Caldicot | Freehold | 57 m² | £197,500 (2024) |
| 18, Birch Close, Undy, Caldicot | Freehold | 67 m² | £135,000 (2013) |
| 19 Birch Close, Undy, Caldicot | Freehold | 53 m² | £130,000 (2006) |
| 20, Birch Close, Undy, Caldicot | Freehold | 56 m² | £119,500 (2006) |
| 21, Birch Close, Undy, Caldicot | - | 56 m² | - |
| 22 Birch Close, Undy, Caldicot | Freehold | 67 m² | £136,500 (2015) |
| 23, Birch Close, Undy, Caldicot | Freehold | 66 m² | £122,000 (2007) |