M4 Cardiff / Caerdydd, Cardiff
11 addresses across 7 postcodes (CF14,CF23), about 7.6 km (4.7 miles) long, classed as a motorway. USRN 5803637.
- Flood: No postcode centre on the street is in flood zone 2 or 3.
- Council tax: Most homes around it are in council tax band G; Band D in Cardiff costs £2,013 a year in 2026-27.
- Broadband: Gigabit broadband is available to 0% to 100% of premises.
- Transport: The nearest railway station is Rhiwbina, about 1.9 km (1.2 miles) away in a straight line.
- Green space: The nearest park or garden is about 700 m (0.4 miles) away.
- Air: Background air pollution in 2024 was 10.8 µg/m³ of nitrogen dioxide and 5.9 of PM2.5, within UK legal limits.
- Height: Its addresses are 61 to 113 m above sea level.
- Noise: 11 of its 11 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is North Cardiff Medical Centre, about 1.3 km (0.8 miles) away.
- People: About 2,080 people lived in the census areas around it in 2021; 88% of households owned their home and 57% of adults held a degree or other higher qualification.
Sales on this street
No sales recorded on this street since January 1995 under this street name.
Energy performance certificates
No certificates found for addresses on this street.
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 neighbourhoods around this street: most are in band G (33% of about 3,570 homes).
Planning and heritage
- Conservation area: no postcode centre in this street's postcodes is in one.
- Listed buildings on or by this street: 16.
- Article 4 directions, tree preservation orders and green belt: Wales has no national record of these; the council's planning department holds them.
Listed buildings
- Church of St Denys, grade II*
- Briwnant Farmhouse and adjoining farm range, grade II
- Carn Ingli, grade II
- Cerrig Llwyd, grade II
- Coach House at Ty Gwyn, grade II
- Fynnon Wen Public House, grade II
- Glan-y-nant, grade II
- Hill House, grade II
- Lisvane House, grade II
- Llanishen Fach, grade II
- Pant-teg (aka Panteg), grade II
- Pantysgawen, grade II
- The Court School including attached chapel, grade II
- The Dingle, grade II
- The Hollies including former coach-house range, grade II
- Ty Gwyn, grade II
Roadworks
Street works permits come from the Department for Transport's Street Manager, which covers England only.
Flood risk
Rivers, the sea or surface water: of the 313 address points in this street's postcodes, 20 at high risk, 2 at medium risk and 4 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: 20 at high risk, 2 at medium risk and 4 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 on this street is in flood zone 2 or 3. Welsh zones include an allowance for climate change.
| Postcode | Planning zone | Addresses at high / medium / low risk |
|---|---|---|
| CF14 0UD | not in 2 or 3 | 0 / 0 / 0 |
| CF14 0RP | not in 2 or 3 | 5 / 0 / 0 |
| CF14 0HY | not in 2 or 3 | 1 / 0 / 0 |
| CF14 0SN | not in 2 or 3 | 10 / 1 / 1 |
| CF14 0UF | not in 2 or 3 | 3 / 1 / 0 |
| CF14 9UG | not in 2 or 3 | 1 / 0 / 3 |
| CF23 8RT | not in 2 or 3 | 0 / 0 / 0 |
Height above sea level
The street's 11 addresses are between 61 m and 113 m above sea level (84 m on average); the ground rises about 52 m from the lowest to the highest.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| CF14 0HY | 0% | 0% | 0% | 67% |
| CF14 0RP | 0% | 0% | 0% | 0% |
| CF14 0SN | 72% | 66% | 66% | 9% |
| CF14 0UD | 100% | 97% | 97% | 0% |
| CF14 0UF | 70% | 60% | 60% | 5% |
| CF14 9UG | 100% | 100% | 100% | 0% |
| CF23 8RT | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Rhiwbina 82,000 journeys in 2024–25 | 1.9 km (1.2 miles) |
| Lisvane and Thornhill 241,000 journeys in 2024–25 | 2 km (1.3 miles) | |
| Birchgrove 53,000 journeys in 2024–25 | 2.1 km (1.3 miles) | |
| Bus stops | 0 stops within 400 m (0.2 miles), 18 within 800 m (0.5 miles); nearest Crematorium Top Thornhill | 460 m (0.3 miles) |
| Bus or coach station | Caerphilly Interchange Stand 11 | 3.7 km (2.3 miles) |
| Ferry terminal | Cardiff Castle Waterbus Stop | 6.6 km (4.1 miles) |
| EV charging points | MFG Charging Station | 1.7 km (1 mile) |
| Airport with scheduled flights | Cardiff International Airport CWL | 18.2 km (11 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 1 practices within 1.6 km (1 mile); nearest North Cardiff Medical Centre | 1.3 km (0.8 miles) |
| Pharmacies | 3 pharmacies within 1.6 km (1 mile); nearest Well | 1 km (0.6 miles) |
| NHS dentists | 1 practices within 1.6 km (1 mile); nearest Thornhill Road (Dental Surgery) | 1.6 km (1 mile) |
| Hospital | Bft Southmead University Hospital Of Wales | 3.8 km (2.3 miles) |
| Police station | Llanishen Police Station | 2.1 km (1.3 miles) |
| Cash machines | BR Spar Llanishen Fach, Rhiwbina Cashzone | 1.1 km (0.7 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 2 within 800 m (0.5 miles); nearest Unnamed 7.4 ha | 700 m (0.4 miles) |
| Play area | 1 within 800 m (0.5 miles); nearest Unnamed 590 m² | 560 m (0.3 miles) |
| Playing field | 1 within 800 m (0.5 miles); nearest Unnamed 1.4 ha | 540 m (0.3 miles) |
| Allotments | Lon y Deri Allotments 1,470 m² | 1.7 km (1.1 miles) |
Within 800 m (0.5 miles): 2 parks and gardens, 9.2 hectares in all.
Landmarks
The nearest historic landmark is Wenallt Camp, Rhiwbina, a scheduled monument, 750 m (0.5 miles) west. 4 listed buildings are within 1 km (0.6 miles).
| Name | What it is | From the middle of the street |
|---|---|---|
| Wenallt Camp, Rhiwbina | Scheduled monument | 750 m (0.5 miles) west |
| Twmpath, Rhiwbina | Scheduled monument | 900 m (0.6 miles) south-west |
| Castell Morgraig | Scheduled monument | 1.5 km (0.9 miles) north |
| Parc Cefn Onn | Registered park or garden, Grade II | 2.2 km (1.3 miles) north-east |
| Coryton House | Registered park or garden, Grade II | 2.5 km (1.6 miles) south-west |
| Name | What it is | From the middle of the street |
|---|---|---|
| Wenallt | Wood | 790 m (0.5 miles) south-west |
| Coedifanbychan | Wood | 830 m (0.5 miles) north-east |
| Cwm Nofydd | Valley | 1 km (0.6 miles) south-west |
| Coed-y-wenallt | Wood | 1 km (0.6 miles) north-west |
| Blue Pool | Lake or reservoir | 2.6 km (1.6 miles) west |
| Caerphilly Common | Hill | 2.7 km (1.7 miles) north |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 10.8 | 40 | 10 |
| Fine particles (PM2.5) | 5.9 | 20 | 5 |
| Particles (PM10) | 11.2 | 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
| Level | Road traffic | Railways |
|---|---|---|
| 75 dB or more | 3 | 0 |
| 70 to 74 | 4 | 0 |
| 65 to 69 | 2 | 0 |
| 60 to 64 | 1 | 0 |
| 55 to 59 | 1 | 2 |
| Under 55 | 0 | 9 |
11 of the street's 11 addresses are modelled at 55 dB or more from road traffic, and 2 from railways, above the WHO guidelines.
Climate, daylight and earthquakes
Monthly temperatures and rainfall, sunrise and sunset through the year, and earthquakes recorded nearby since 1970 are much the same across the area, so they are worked out once for Cardiff: see them on the Cardiff page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Llanishen Fach Primary School English medium | Primary | 3–11 | 1 km (0.6 miles) | Estyn reports · My Local School |
| Ysgol Y Wern Welsh medium | Primary | 3–11 | 1.2 km (0.7 miles) | Estyn reports · My Local School |
| Thornhill Primary School English medium | Primary | 3–11 | 1.5 km (0.9 miles) | Estyn reports · My Local School |
| Rhiwbeina Primary School English medium | Primary | 3–11 | 1.6 km (1 mile) | Estyn reports · My Local School |
| Llanishen High School English medium | Secondary | 11–19 | 1.9 km (1.2 miles) | Estyn reports · My Local School |
Food hygiene ratings nearby
No rated food businesses within 500 m (0.3 miles).
Crime within 250 m
No crimes recorded at anonymised points within 250 m in this period (south-wales).
People and work
Who lives here
| Around this street | Wales | |
|---|---|---|
| Median age | 45 | 43 |
| Children under 15 | 18% | 17% |
| Aged 65 and over | 19% | 21% |
Homes
| Around this street | Wales | |
|---|---|---|
| Owned (outright or with a mortgage) | 88% | 66% |
| Owned outright | 41% | 38% |
| Shared ownership | under 1% | under 1% |
| Social rented | 3% | 17% |
| Private rented | 10% | 17% |
Work and commuting
| Around this street | Wales | |
|---|---|---|
| Adults (16 and over) in work | 62% | 54% |
| Unemployment (of those working or looking for work) | 4% | 6% |
| Retired (of adults) | 23% | 25% |
| Long-term sick or disabled (of adults) | 1% | 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 | 1% | under 1% |
| By any public transport, including bus | 2% | 3% |
| On foot or by bicycle | 4% | 8% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 67% | 60% |
| Work 30 km (19 miles) or more away | 7% | 10% |
Education and languages
| Around this street | Wales | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 57% | 32% |
| No qualifications | 7% | 20% |
| Apprenticeship as highest qualification | 3% | 6% |
| Main language English or Welsh (aged 3 and over) | 96% | 97% |
| Cannot speak English well or at all | under 1% | under 1% |
Deprivation
The 4 neighbourhoods around this street are in deciles 9 to 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.
What has changed
Nothing new since the change feed started on 30 October 2026. New sales and energy certificates, and hygiene ratings, school inspections and flood figures nearby, will be listed here as the sources update.
Postcodes on this street
- CF14 0UD: 4 addresses of 45 in the postcode
- CF14 0RP: 2 addresses of 26 in the postcode
- CF14 0HY: 1 address of 9 in the postcode
- CF14 0SN: 1 address of 93 in the postcode
- CF14 0UF: 1 address of 76 in the postcode
- CF14 9UG: 1 address of 50 in the postcode
- CF23 8RT: 1 address of 14 in the postcode
Nearby streets
A4054 · M4 · Coed y Wenallt
What this page cannot tell you
- Whether a particular house is at risk of flooding, subsiding or anything else: the flood map is a model of areas and there is no property-level data here.
- What a home is worth now: sales are historic prices for the homes that happened to sell.
- How safe the street is: crime points are moved to anonymised locations and many crimes are never reported.
- Whether you would get a place at a school: distances are straight lines, not catchments.
- Who lives on the street now: census figures describe the small areas around it in March 2021, during a lockdown.
- How long a journey takes or how often anything runs: transport distances are straight lines to the nearest stops.
- Whether a GP practice is taking new patients, or a dentist new NHS patients.
- How loud a home is inside, or noise from industry, neighbours or smaller airfields: noise figures are models of road, rail and air traffic outside.
How each figure on this page is matched to the street and worked out: methodology.