CF23 8NL Cardiff
Live postcode, introduced June 1999. Ward: Pontprennau and Old St Mellons.
Streets
Council tax
What each band costs in Cardiff in 2026-27: Band D £2,013 a year on average, including the police and community council charges.
| A | B | C | D | E | F | G | H | I |
|---|---|---|---|---|---|---|---|---|
| £1,342 | £1,566 | £1,789 | £2,013 | £2,461 | £2,908 | £3,355 | £4,026 | £4,697 |
Homes by band in the neighbourhood around this postcode: most are in band D (43% of about 740 homes).
Planning and heritage
- Conservation area: no postcode centre in this postcode is in one.
- Listed buildings within 100 m of this postcode: none.
- Article 4 directions, tree preservation orders and green belt: Wales has no national record of these; the council's planning department holds them.
Flood risk
Rivers, the sea or surface water: of the 28 address points in this postcode, 0 at high risk, 0 at medium risk and 2 at low risk. Each counts once, at the higher of its rivers-and-sea and surface-water risk.
Rivers and the sea alone: none is in an area at risk. Surface water and small watercourses alone: 0 at high risk, 0 at medium risk and 2 at low risk.
High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. The map allows for flood defences. Address points are every property record (UPRN) in the postcode, each counted if it is in an area or within 5 m of one (the maps stop at building walls); a few are not homes, such as garages, business units or caravan pitches. Counts cover whole postcodes, which can include other streets.
Flood zone for planning: no postcode centre is in flood zone 2 or 3. Welsh zones include an allowance for climate change.
Height above sea level
The postcode's 28 addresses are between 44 m and 49 m above sea level (48 m on average).
Broadband
Superfast 100%, ultrafast 8%, gigabit 0% of premises; 0% cannot get 10 Mbit/s. Ofcom Connected Nations, data as at January 2026.
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Llanishen 226,000 journeys in 2024–25 | 3.7 km |
| Lisvane and Thornhill 241,000 journeys in 2024–25 | 4.0 km | |
| Heath High Level 425,000 journeys in 2024–25 | 4.3 km | |
| Bus stops | 9 stops within 400 m, 21 within 800 m; nearest Heol Pontprennau | 200 m |
| Bus or coach station | Caerphilly Interchange Stand 11 | 7.3 km |
| Ferry terminal | Cardiff Castle Waterbus Stop | 7.2 km |
| Car parks | Cardiff East Park And Ride | 1.7 km |
| EV charging points | 3 within 1.6 km; nearest Gridserve Charging Station | 340 m |
| Airport with scheduled flights | Cardiff International Airport CWL | 21.5 km |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | Cyncoed Medical Practice | 1.6 km |
| Pharmacies | 3 pharmacies within 1.6 km; nearest Asda Pharmacy | 0 m |
| NHS dentists | 1 practices within 1.6 km; nearest Pontprennau Dental Care | 820 m |
| Hospital | Bft Southmead University Hospital Of Wales | 5.2 km |
| Police station | Llanedeyrn Police Station | 3.0 km |
| Cash machines | 3 machines within 800 m; nearest Cardiff Gate - Int 1, Junction 30 | 170 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 4 within 800 m; nearest Unnamed 7,010 m² | 140 m |
| Largest park within 800 m | Unnamed 4.6 ha | 460 m |
| Play area | 3 within 800 m; nearest Unnamed 590 m² | 310 m |
| Playing field | 1 within 800 m; nearest Unnamed 7,330 m² | 600 m |
| Allotments | Unnamed 1.1 ha | 1.4 km |
Within 800 m: 4 parks and gardens, 7.4 hectares in all.
Landmarks
The nearest historic landmark is Church of St Edeyrn, a listed building (Grade II*), 610 m south-east. 4 listed buildings are within 1.0 km, 1 of them Grade II*.
| Name | What it is | From the postcode's centre |
|---|---|---|
| Church of St Edeyrn | Listed building, Grade II* | 610 m south-east |
| Cefn Mably | Registered park or garden, Grade II | 1.5 km north |
| St Mellons Churchyard Cross | Scheduled monument | 1.6 km south-east |
| Castle Field Camp E Of Craig-Llywn | Scheduled monument | 2.0 km north-west |
| Ty Gwyn | Registered park or garden, Grade II* | 2.9 km west |
| Name | What it is | From the postcode's centre |
|---|---|---|
| Pwllchwecherw | Lake or reservoir | 750 m south |
| Pwll Ysgendy | Lake or reservoir | 820 m east |
| Llyn y Corwydd | Lake or reservoir | 830 m south-east |
| Coedcae-bach | Wood | 1.2 km north |
| Cwm Du | Valley | 3.2 km north |
| Craig Llysfaen | Hill | 3.8 km north-west |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 11.2 | 40 | 10 |
| Fine particles (PM2.5) | 6.2 | 20 | 5 |
| Particles (PM10) | 10.7 | 40 | 15 |
All three are within the UK legal limits; nitrogen dioxide and PM2.5 are above the WHO guideline, as in most towns and cities.
Road and rail noise
Defra's noise maps cover England only; the Welsh Government's 2022 maps are not shown here yet.
People and work
Who lives here
| Around this postcode | Wales | |
|---|---|---|
| Median age | 38 | 43 |
| Children under 15 | 22% | 17% |
| Aged 65 and over | 12% | 21% |
Homes
| Around this postcode | Wales | |
|---|---|---|
| Owned (outright or with a mortgage) | 78% | 66% |
| Owned outright | 30% | 38% |
| Shared ownership | 0% | under 1% |
| Social rented | 1% | 17% |
| Private rented | 21% | 17% |
Work and commuting
| Around this postcode | Wales | |
|---|---|---|
| Adults (16 and over) in work | 68% | 54% |
| Unemployment (of those working or looking for work) | 5% | 6% |
| Retired (of adults) | 14% | 25% |
| Long-term sick or disabled (of adults) | 2% | 6% |
| Work mainly from home (of those in work) | 44% | 26% |
| Travel to work by car or van | 50% | 61% |
| By train, Underground, metro or tram | 0% | under 1% |
| By any public transport, including bus | 3% | 3% |
| On foot or by bicycle | 3% | 8% |
| Work within 10 km of home (of those who travel to work) | 72% | 60% |
| Work 30 km or more away | 9% | 10% |
Education and languages
| Around this postcode | Wales | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 51% | 32% |
| No qualifications | 8% | 20% |
| Apprenticeship as highest qualification | 4% | 6% |
| Main language English or Welsh (aged 3 and over) | 92% | 97% |
| Cannot speak English well or at all | under 1% | under 1% |
Deprivation
The neighbourhood around this postcode is in decile 10 of 10 on the Welsh Index of Multiple Deprivation 2025, where 1 is the most deprived tenth of Wales's 1,917 neighbourhoods and 10 the least.