| Postcode | CF45 4HL | 
|---|---|
| Post Town | Mountain Ash | 
| Nearest station | Mountain Ash (1 km) | 
| Bus stops | Mount Pleasant (SE) Park Hotel (NW) Mount Pleasant (N) Bailey`s Arms (SE) Woodfield Terrace (SE) Bailey Arms (N) | 
| Roads in this postcode | |
| Number of UPRNs | 6 View | 
| Known addresses | 1 John Street, Mountain Ash 2 John Street, Mountain Ash | 
| Main property type | Terraced | 
| Businesses | 
| Latitude | 51.677666 | |
|---|---|---|
| Longitude | -3.367796 | |
| Easting | 305523 | |
| Northing | 198542 | |
| Grid reference | ST055985 | |
| UTM reference | 30U 474569 5725252 | |
| what3words | scrapping.charging.factory | |
| FixPhrase | crinkle lung stood untouched | |
| Plus code | 9C3RMJHJ+3V | |
| Altitude | 118 metres (387 feet) | |
| Sunrise (today) | 7:06 | |
| Sunset (today) | 16:49 | |
| Distance away | ||
| Distance to sea | 26.9 KMs (16.7 miles) | 
| Parish | Mountain Ash East | W04001016 | 
|---|---|---|
| Ward | Mountain Ash | W05001092 | 
| 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) | 8 | |
|---|---|---|
| Households (2011) | 3 | |
| 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) | W00006342 | |
| Census output area (2011) | 8B1 | |
| Lower layer super output area (2021) | Rhondda Cynon Taf 006A | W01001204 | 
| Lower layer super output area (2011) | Rhondda Cynon Taf 006A | W01001204 | 
| Middle layer super output area (2021) | Mountain Ash | W02000257 | 
| Middle layer super output area (2011) | Mountain Ash | W02000257 | 
| Travel to work area | Merthyr Tydfil | W22000029 | 
| Average property price in Cardiff | £221,509 | 
|---|---|
| Annual change | 2.2% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| 2 John Street, Mountain Ash | Terraced (freehold) | Jan 2023 | £91,500 | 
| Terraced (freehold) | Dec 2016 | £64,000 | |
| Terraced (freehold) | May 2004 | £44,000 | |
| Terraced (freehold) | Dec 2002 | £34,950 | |
| Terraced (freehold) | Apr 2002 | £30,500 | |
| Terraced (freehold) | Oct 1999 | £12,000 | |
| 1 John Street, Mountain Ash | Semi-detached (freehold) | Aug 2018 | £85,000 | 
| Semi-detached (freehold) | May 2002 | £35,000 |