| 1, Celtic Close, Undy, Caldicot | Freehold | 138 m² | £339,950 (2017) |
| 2 Celtic Close, Undy, Caldicot | Freehold | 113 m² | £445,000 (2023) |
| 3, Celtic Close, Undy, Caldicot | Freehold | 95 m² | £236,950 (2017) |
| 4, Celtic Close, Undy, Caldicot | - | 89 m² | - |
| 5, Celtic Close, Undy, Caldicot | Freehold | 74 m² | £190,000 (2013) |
| 8 Celtic Close, Undy, Caldicot | Freehold | 103 m² | £85,000 (2000) |
| 10, Celtic Close, Undy, Caldicot | Freehold | 77 m² | £244,475 (2018) |
| 11, Celtic Close, Undy, Caldicot | Freehold | 88 m² | £185,000 (2016) |
| 13 Celtic Close, Undy, Caldicot | Freehold | 128 m² | £236,000 (2010) |
| 14, Celtic Close, Undy, Caldicot | Freehold | 134 m² | £245,000 (2012) |
| 16, Celtic Close, Undy, Caldicot | Freehold | 107 m² | £223,500 (2014) |
| 17 Celtic Close, Undy, Caldicot | Freehold | 116 m² | £395,000 (2023) |
| 18, Celtic Close, Undy, Caldicot | Freehold | 81 m² | £225,500 (2017) |
| 19 Celtic Close, Undy, Caldicot | Freehold | 86 m² | £320,000 (2024) |
| 21 Celtic Close, Undy, Caldicot | Freehold | 55 m² | £305,000 (2024) |
| 22, Celtic Close, Undy, Caldicot | Freehold | 94 m² | £233,000 (2014) |
| 23, Celtic Close, Undy, Caldicot | Freehold | 81 m² | £219,950 (2017) |
| 24, Celtic Close, Undy, Caldicot | Freehold | 79 m² | £250,000 (2020) |
| 25, Celtic Close, Undy, Caldicot | Freehold | 119 m² | £270,000 (2016) |
| 28, Celtic Close, Undy, Caldicot | Freehold | 83 m² | £275,000 (2019) |
| 30 Celtic Close, Undy, Caldicot | Freehold | 123 m² | £248,500 (2016) |
| 31 Celtic Close, Undy, Caldicot | Freehold | 101 m² | £96,000 (2001) |
| 32, Celtic Close, Undy, Caldicot | Freehold | 97 m² | £167,000 (2016) |