| Postcode | CF45 3SJ | 
|---|---|
| Post Town | Mountain Ash | 
| Nearest station | Penrhiwceiber (0 km) | 
| Bus stops | Infants School (NW) The Surgery (NW) The Surgery (SE) Vaughan Terrace (NE) Bellevue (SE) Bellevue (NW) | 
| Roads in this postcode | |
| Number of UPRNs | 9 View | 
| Known addresses | Bryn Hermon, Penybryn Road, Mountain Ash Brynteg, Penybryn Road, Mountain Ash Cynon View, Penybryn Road, Mountain Ash Derlwyn, Penybryn Road, Mountain Ash Ty Carreg, Penybryn Road, Mountain Ash | 
| Main property type | Detached | 
| Businesses | 
                        No businesses found
                     | 
| Latitude | 51.667671 | |
|---|---|---|
| Longitude | -3.363605 | |
| Easting | 305792 | |
| Northing | 197425 | |
| Grid reference | ST057974 | |
| UTM reference | 30U 474853 5724139 | |
| what3words | crumples.voltage.forks | |
| FixPhrase | crinkle lung staleness unwound | |
| Plus code | 9C3RMJ9P+3H | |
| Altitude | 161 metres (529 feet) | |
| Sunrise (today) | 7:06 | |
| Sunset (today) | 16:49 | |
| Distance away | ||
| Distance to sea | 25.9 KMs (16.1 miles) | 
| Parish | Penrhiwceiber | W04000694 | 
|---|---|---|
| Ward | Penrhiw-ceibr | W05001093 | 
| Unitary Authority | Rhondda Cynon Taf | W06000016 | 
| County | Mid Glamorgan | W11000005 | 
| Constituency (2024) | Pontypridd | W07000106 | 
| MP | Alex Davies-Jones | Labour | 
| Police force | South Wales | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Central Valleys and Bridgend | |
| NUTS/ITL 2 | South East Wales | |
| NUTS/ITL 1 | Wales | |
| Country | Wales | W92000004 | 
| Date introduced | January 1980 | 
|---|---|
| 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) | 18 | |
|---|---|---|
| Households (2011) | 7 | |
| Index of Multiple Deprivation (2019) | Most deprivedLeast deprived | |
| Average household income (2020) | Lowest (£22,200)
                        Highest (£108,100)
                       | |
| Rural/urban (2021) | Urban: Further from a major town or city | |
| Rural/urban (2011) | Urban city and town | |
| Built up area (2024) | Mountain Ash | W45001094 | 
| Census output area (2021) | W00006372 | |
| Census output area (2011) | 8B1 | |
| Lower layer super output area (2021) | Rhondda Cynon Taf 008A | W01001209 | 
| Lower layer super output area (2011) | Rhondda Cynon Taf 008A | W01001209 | 
| Middle layer super output area (2021) | Penrhiw-ceibr | W02000259 | 
| Middle layer super output area (2011) | Penrhiw-ceibr | W02000259 | 
| Travel to work area | Merthyr Tydfil | W22000029 | 
| Average property price in Cardiff | £221,509 | 
|---|---|
| Annual change | 2.2% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Ty Carreg, Penybryn Road, Mountain Ash | Other (freehold) | Jul 2021 | £470,000 | 
| Derlwyn, Penybryn Road, Mountain Ash | Detached (freehold) | Mar 2019 | £76,975 | 
| Detached (freehold) | Apr 1999 | £60,000 | |
| Detached (freehold) | Feb 1996 | £49,950 | |
| Bryn Hermon, Penybryn Road, Mountain Ash | Terraced (freehold) | Jul 2002 | £65,000 | 
| Brynteg, Penybryn Road, Mountain Ash | Semi-detached (freehold) | Jul 2000 | £36,000 | 
| Cynon View, Penybryn Road, Mountain Ash | Detached (freehold) | May 1999 | £77,750 |