| Postcode | CF83 2JS | 
|---|---|
| Post Town | Caerphilly | 
| Nearest station | Energlyn and Churchill Park (1 km) | 
| Bus stops | Moel Fryn (S) Cwm Ifor School (NW) Clos Cyncoed (NW) Clos Cyncoed (SE) Cwm Ifor School (SE) Troed y Bryn (NE) | 
| Roads in this postcode | |
| Number of UPRNs | 21 View | 
| Known addresses | 2 Cefn Y Lon, Caerphilly 7 Cefn Y Lon, Caerphilly 9 Cefn Y Lon, Caerphilly 11 Cefn Y Lon, Caerphilly 13 Cefn Y Lon, Caerphilly 15 Cefn Y Lon, Caerphilly 17 Cefn Y Lon, Caerphilly 19 Cefn Y Lon, Caerphilly 25 Cefn Y Lon, Caerphilly 29 Cefn Y Lon, Caerphilly | 
| Main property type | Semi-detached | 
| Businesses | 
| Latitude | 51.589617 | |
|---|---|---|
| Longitude | -3.243978 | |
| Easting | 313917 | |
| Northing | 188596 | |
| Grid reference | ST139885 | |
| UTM reference | 30U 483098 5715424 | |
| what3words | hillsides.mush.charities | |
| FixPhrase | cringing lurch subsonic unsealed | |
| Plus code | 9C3RHQQ4+RC | |
| Altitude | 146 metres (479 feet) | |
| Sunrise (today) | 7:06 | |
| Sunset (today) | 16:49 | |
| Distance away | ||
| Distance to sea | 14 KMs (8.7 miles) | 
| Parish | Penyrheol, Trecenydd and Energlyn | W04000911 | 
|---|---|---|
| Ward | Penyrheol | W05001669 | 
| Unitary Authority | Caerphilly | W06000018 | 
| County | Gwent | W11000003 | 
| Constituency (2024) | Caerphilly | W07000088 | 
| MP | Chris Evans | Labour | 
| Police force | Gwent | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Gwent Valleys | |
| NUTS/ITL 2 | South East Wales | |
| NUTS/ITL 1 | Wales | |
| Country | Wales | W92000004 | 
| Date introduced | July 1995 | 
|---|---|
| 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) | 57 | |
|---|---|---|
| Households (2011) | 20 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Nearer to a major town or city | |
| Rural/urban (2011) | Urban city and town | |
| Built up area (2024) | Caerphilly | W45001178 | 
| Census output area (2021) | W00007298 | |
| Census output area (2011) | 8A2 | |
| Lower layer super output area (2021) | Caerphilly 019E | W01001397 | 
| Lower layer super output area (2011) | Caerphilly 019E | W01001397 | 
| Middle layer super output area (2021) | Llanbradach & Penyrheol | W02000308 | 
| Middle layer super output area (2011) | Llanbradach & Penyrheol | W02000308 | 
| Travel to work area | Cardiff | W22000024 | 
| Average property price in Cardiff | £221,509 | 
|---|---|
| Annual change | 2.2% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 2 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Mar 2025 | £210,000 | 
| Semi-detached (freehold) | Apr 2016 | £114,950 | |
| 13 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Oct 2022 | £172,000 | 
| Semi-detached (freehold) | Oct 2017 | £110,000 | |
| 9 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Sep 2022 | £168,000 | 
| Semi-detached (freehold) | Oct 2014 | £87,500 | |
| Terraced (freehold) | Jul 2003 | £63,500 | |
| 25 Cefn Y Lon, Caerphilly | Terraced (freehold) | Oct 2019 | £159,950 | 
| Terraced (freehold) | Nov 2016 | £136,500 | |
| Terraced (freehold) | Jun 1999 | £47,500 | |
| 19 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Mar 2019 | £136,000 | 
| Semi-detached (freehold) | Apr 2011 | £82,000 | |
| Semi-detached (freehold) | May 2007 | £87,000 | |
| 17 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Jan 2019 | £142,500 | 
| 29 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Nov 2005 | £78,000 | 
| 7 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | May 2002 | £45,000 | 
| Semi-detached (freehold) | Feb 1996 | £36,000 | |
| 11 Cefn Y Lon, Caerphilly | Terraced (freehold) | Jan 2002 | £36,000 | 
| 15 Cefn Y Lon, Caerphilly | Semi-detached (freehold) | Feb 1995 | £34,750 |