| Postcode | CF3 2UU | 
|---|---|
| Post Town | Cardiff | 
| Nearest station | Pye Corner (5 km) | 
| Bus stops | Post Office (SW) Coach & Horses (NE) Marshfield Primary School (NW) Marshfield Primary School (S) | 
| Roads in this postcode | |
| Number of UPRNs | 43 View | 
| Known addresses | Aishling House, 18 Marshfield Road, Castleton Chelmsford, Marshfield Road, Castleton Glendale House, 5 Marshfield Road, Castleton Hillside Cottage, 4 Marshfield Road, Castleton Melrose, Marshfield Road, Castleton Oak View, Marshfield Road, Castleton Roswyn, Marshfield Road, Castleton The Laurels, Marshfield Road, Castleton 2 Marshfield Road, Castleton 4 Marshfield Road, Castleton 4A Marshfield Road, Castleton 5 Marshfield Road, Castleton 9 Marshfield Road, Castleton 10 Marshfield Road, Castleton 15 Marshfield Road, Castleton 16 Marshfield Road, Castleton 17 Marshfield Road, Castleton 19 Marshfield Road, Castleton 21 Marshfield Road, Castleton 32 Marshfield Road, Castleton 299 Marshfield Road, Castleton 299A Marshfield Road, Castleton 301 Marshfield Road, Castleton 302 Marshfield Road, Castleton 305 Marshfield Road, Castleton 306 Marshfield Road, Castleton 309 Marshfield Road, Castleton 310 Marshfield Road, Castleton 311 Marshfield Road, Castleton | 
| Main property type | Detached | 
| Businesses | 
| Latitude | 51.54356 | |
|---|---|---|
| Longitude | -3.077747 | |
| Easting | 325357 | |
| Northing | 183291 | |
| Grid reference | ST253832 | |
| UTM reference | 30U 494608 5710276 | |
| what3words | trackers.screamed.teach | |
| FixPhrase | cringing luridness slightly unpledged | |
| Plus code | 9C3RGWVC+CW | |
| Altitude | 25 metres (83 feet) | |
| Sunrise (today) | 7:05 | |
| Sunset (today) | 16:48 | |
| Distance away | ||
| Distance to sea | 3.5 KMs (2.2 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) | 90 | |
|---|---|---|
| Households (2011) | 36 | |
| 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 | 
|---|---|---|---|
| Chelmsford, Marshfield Road, Castleton | Semi-detached (freehold) | Nov 2024 | £440,000 | 
| Semi-detached (freehold) | Dec 2020 | £392,500 | |
| 19 Marshfield Road, Castleton | Detached (freehold) | Jul 2024 | £450,000 | 
| Detached (freehold) | Apr 1997 | £85,000 | |
| 2 Marshfield Road, Castleton | Semi-detached (freehold) | May 2024 | £280,000 | 
| 301 Marshfield Road, Castleton | Detached (freehold) | Aug 2023 | £790,000 | 
| Detached (freehold) | Oct 2021 | £695,000 | |
| 311 Marshfield Road, Castleton | Semi-detached (freehold) | Sep 2021 | £260,000 | 
| Semi-detached (freehold) | Feb 2019 | £198,000 | |
| 10 Marshfield Road, Castleton | Semi-detached (freehold) | Feb 2021 | £455,000 | 
| Semi-detached (freehold) | Jul 2016 | £260,000 | |
| 310 Marshfield Road, Castleton | Semi-detached (freehold) | Mar 2020 | £310,000 | 
| Semi-detached (freehold) | Nov 2013 | £200,000 | |
| Semi-detached (freehold) | Aug 2002 | £159,950 | |
| Semi-detached (freehold) | Apr 2000 | £71,000 | |
| 16 Marshfield Road, Castleton | Detached (freehold) | Jan 2020 | £610,000 | 
| Detached (freehold) | Feb 1996 | £72,000 | |
| 305 Marshfield Road, Castleton | Detached (freehold) | Apr 2019 | £480,000 | 
| Oak View, Marshfield Road, Castleton | Semi-detached (leasehold) | Jul 2018 | £359,950 | 
| Detached (freehold) | Apr 2008 | £210,000 |