| Postcode | NP26 3DP | 
|---|---|
| Post Town | Caldicot | 
| Nearest station | Severn Tunnel Junction (3 km) | 
| Bus stops | No nearby bus stops | 
| Roads in this postcode | |
| Number of UPRNs | 20 View | 
| Known addresses | Diamond Cottage, Undy Greenfield, The Causeway, Undy Hawthorn Cottage, Undy Hawthorn House, Undy Penyclawdd, Undy Withywood Cottage, The Causeway, Undy 1 Causeway Cottages, Undy 2 Causeway Cottages, Undy | 
| Main property type | Detached | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.569195 | |
|---|---|---|
| Longitude | -2.811986 | |
| Easting | 343819 | |
| Northing | 185904 | |
| Grid reference | ST438859 | |
| UTM reference | 30U 513030 5713141 | |
| what3words | broke.hacking.corrupted | |
| FixPhrase | cringing lushly starter trophy | |
| Plus code | 9C3VH59Q+M6 | |
| Altitude | 6 metres (20 feet) | |
| Sunrise (today) | 7:04 | |
| Sunset (today) | 16:47 | |
| Distance away | ||
| Distance to sea | 1.4 KMs (0.9 miles) | 
| Parish | Magor with Undy | W04001073 | 
|---|---|---|
| Ward | Magor East with Undy | W05001782 | 
| Unitary Authority | Monmouthshire | W06000021 | 
| County | Gwent | W11000003 | 
| Constituency (2024) | Monmouthshire | W07000101 | 
| MP | Catherine Fookes | Labour | 
| Police force | Gwent | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Monmouthshire and Newport | |
| NUTS/ITL 2 | South East Wales | |
| NUTS/ITL 1 | Wales | |
| Country | Wales | W92000004 | 
| Date introduced | June 1999 | 
|---|---|
| Last updated | September 2025 | 
| User type | Small (addresses receive less than 25 items of mail per day) | 
| Quality | Within the building of the matched address closest to the postcode mean | 
| Population (2011) | 32 | |
|---|---|---|
| Households (2011) | 10 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Smaller rural: Nearer to a major town or city | |
| Rural/urban (2011) | Rural hamlet and isolated dwellings | |
| Census output area (2021) | W00008188 | |
| Census output area (2011) | 1A1 | |
| Lower layer super output area (2021) | Monmouthshire 011B | W01001573 | 
| Lower layer super output area (2011) | Monmouthshire 011B | W01001573 | 
| Middle layer super output area (2021) | Magor & Rogiet | W02000346 | 
| Middle layer super output area (2011) | Magor & Rogiet | W02000346 | 
| Travel to work area | Newport | K01000013 | 
| Average property price in Newport | £221,300 | 
|---|---|
| Annual change | 2.7% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Hawthorn Cottage, Undy | Detached (freehold) | Feb 2021 | £550,000 | 
| Greenfield, The Causeway, Undy | Other (freehold) | Aug 2019 | £545,000 | 
| Diamond Cottage, Undy | Detached (freehold) | Mar 2018 | £360,000 | 
| 1 Causeway Cottages, Undy | Semi-detached (freehold) | Sep 2011 | £169,950 | 
| 2 Causeway Cottages, Undy | Detached (freehold) | Aug 2005 | £330,000 | 
| Withywood Cottage, The Causeway, Undy | Detached (freehold) | Aug 2005 | £370,000 | 
| Detached (freehold) | Mar 2002 | £200,000 | |
| Penyclawdd, Undy | Detached (freehold) | Nov 1999 | £215,000 | 
| Hawthorn House, Undy | New build detached (freehold) | May 1998 | £137,000 |