| Postcode | SA5 4QY | 
|---|---|
| Post Town | Swansea | 
| Nearest station | Gowerton (1 km) | 
| Bus stops | Derwen Close (NW) Derwen Close (SE) Westfield Road (SE) Westfield Road (NW) Westwinds Close (SE) Bishwell Common (S) | 
| Number of UPRNs | 2 View | 
| Known addresses | Mill Farm, Caergynydd Isaf, Waunarlwydd Rock House, Caergynydd Isaf, Waunarlwydd | 
| Main property type | Detached | 
| Businesses | 
| Latitude | 51.637557 | |
|---|---|---|
| Longitude | -4.026754 | |
| Easting | 259841 | |
| Northing | 195141 | |
| Grid reference | SS598951 | |
| UTM reference | 30U 428945 5721226 | |
| what3words | opens.brick.blaze | |
| FixPhrase | crinkle lumpish skillful unreached | |
| Plus code | 9C3QJXQF+27 | |
| Altitude | 40 metres (131 feet) | |
| Sunrise (today) | 7:09 | |
| Sunset (today) | 16:52 | |
| Distance away | ||
| Distance to sea | 4 KMs (2.5 miles) | 
| Parish | Waunarlwydd | W04001037 | 
|---|---|---|
| Ward | Waunarlwydd | W05001069 | 
| Unitary Authority | Swansea | W06000011 | 
| County | West Glamorgan | W11000008 | 
| Constituency (2024) | Gower | W07000097 | 
| MP | Tonia Antoniazzi | Labour | 
| Police force | South Wales | |
| Water company | Dwr Cymru Welsh Water | |
| NUTS/ITL 3 | Swansea | |
| NUTS/ITL 2 | Mid and South West 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) | 7 | |
|---|---|---|
| Households (2011) | 1 | |
| 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) | Gowerton | W45001112 | 
| Census output area (2021) | W00004064 | |
| Census output area (2011) | 6B2 | |
| Lower layer super output area (2021) | Swansea 012A | W01000759 | 
| Lower layer super output area (2011) | Swansea 012A | W01000759 | 
| Middle layer super output area (2021) | Gowerton | W02000179 | 
| Middle layer super output area (2011) | Gowerton | W02000179 | 
| Travel to work area | Swansea | W22000032 | 
| Average property price in Swansea | £199,131 | 
|---|---|
| Annual change | 2.4% | 
| Address | Type | Date | Price | 
|---|---|---|---|
| Rock House, Caergynydd Isaf, Waunarlwydd | Detached (freehold) | Dec 2010 | £217,000 | 
| Mill Farm, Caergynydd Isaf, Waunarlwydd | Detached (freehold) | Feb 2002 | £245,000 |