| Postcode | CF3 2UW | 
|---|---|
| Post Town | Cardiff | 
| Nearest station | Pye Corner (5 km) | 
| Bus stops | Marshfield Primary School (NW) Sandy Lane Farm (SE) Sandy Lane Farm (NW) Castleton Rise (SE) Post Office (SW) Coach & Horses (NE) | 
| Roads in this postcode | |
| Number of UPRNs | 61 View | 
| Known addresses | Chilmor, 31 Marshfield Road, Castleton Oriskany, Marshfield Road, Castleton Rhostre, Marshfield Road, Castleton Sedna House, Marshfield Road, Castleton St Julians, 297 Marshfield Road, Castleton Woodview, Marshfield Road, Castleton 22 Marshfield Road, Castleton 23 Marshfield Road, Castleton 24 Marshfield Road, Castleton 25 Marshfield Road, Castleton 26 Marshfield Road, Castleton 27 Marshfield Road, Castleton 29 Marshfield Road, Castleton 29B Marshfield Road, Castleton 29C Marshfield Road, Castleton 33 Marshfield Road, Castleton 34 Marshfield Road, Castleton 62 Marshfield Road, Castleton 62A Marshfield Road, Castleton 62B Marshfield Road, Castleton 64 Marshfield Road, Castleton 64A Marshfield Road, Castleton 66 Marshfield Road, Castleton 68 Marshfield Road, Castleton 69 Marshfield Road, Castleton 70 Marshfield Road, Castleton 290 Marshfield Road, Castleton 292 Marshfield Road, Castleton 292A Marshfield Road, Castleton 293 Marshfield Road, Castleton 295 Marshfield Road, Castleton 296 Marshfield Road, Castleton 297 Marshfield Road, Castleton | 
| Main property type | Detached | 
| Businesses |  | 
| Latitude | 51.540201 | |
|---|---|---|
| Longitude | -3.076341 | |
| Easting | 325449 | |
| Northing | 182916 | |
| Grid reference | ST254829 | |
| UTM reference | 30U 494705 5709902 | |
| what3words | bounding.remix.overruns | |
| FixPhrase | cringing luridness slacking trekker | |
| Plus code | 9C3RGWRF+3F | |
| Altitude | 15 metres (49 feet) | |
| Sunrise (today) | 7:05 | |
| Sunset (today) | 16:48 | |
| Distance away | ||
| Distance to sea | 3.1 KMs (1.9 miles) | 
| Parish | Marshfield | W04000823 | 
|---|---|---|
| Ward | Tredegar Park and Marshfield | W05001646 | 
| Unitary Authority | Newport | W06000022 | 
| County | Gwent | W11000003 | 
| Constituency (2024) | Newport West and Islwyn | W07000105 | 
| MP | Ruth Jones | 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) | 115 | |
|---|---|---|
| Households (2011) | 41 | |
| 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 village | |
| Built up area (2024) | Castleton (Newport) | W45001194 | 
| Census output area (2021) | W00008602 | |
| Census output area (2011) | 6A3 | |
| Lower layer super output area (2021) | Newport 020D | W01001658 | 
| Lower layer super output area (2011) | Newport 020D | W01001658 | 
| Middle layer super output area (2021) | Marshfield | W02000366 | 
| Middle layer super output area (2011) | Marshfield | W02000366 | 
| Travel to work area | Cardiff | W22000024 | 
| Average property price in Cardiff | £221,509 | 
|---|---|
| Annual change | 2.2% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 25 Marshfield Road, Castleton | Detached (freehold) | Jan 2025 | £375,000 | 
| Chilmor, 31 Marshfield Road, Castleton | Detached (freehold) | Nov 2024 | £495,000 | 
| Detached (freehold) | Jul 2020 | £455,000 | |
| 62 Marshfield Road, Castleton | Detached (freehold) | Dec 2023 | £439,000 | 
| Sedna House, Marshfield Road, Castleton | Other (freehold) | Sep 2022 | £482,500 | 
| 62B Marshfield Road, Castleton | Detached (freehold) | Aug 2022 | £555,500 | 
| Detached (freehold) | Aug 2017 | £430,000 | |
| St Julians, 297 Marshfield Road, Castleton | Detached (freehold) | Feb 2022 | £625,000 | 
| 23 Marshfield Road, Castleton | Detached (freehold) | Dec 2021 | £675,000 | 
| Detached (freehold) | Mar 2014 | £420,000 | |
| Detached (freehold) | Feb 2001 | £155,000 | |
| 29B Marshfield Road, Castleton | Detached (freehold) | Dec 2021 | £730,000 | 
| 27 Marshfield Road, Castleton | Detached (freehold) | Jul 2021 | £310,000 | 
| 292A Marshfield Road, Castleton | Detached (freehold) | Nov 2020 | £448,500 |