Llandennis Avenue is in Cardiff and in Cardiff district. CF23 6JG is located in the Cyncoed electoral ward, within the English Parliamentary constituency of Cardiff Central. This postcode has been in use since 1999-06-01.
StreetScan combines information about Llandennis Avenue, Cardiff, CF23 6JG and displays a report on the quality of life in this place and its surroundings.
Nearby postcodes are: CF23 6JB, CF23 6JD, CF23 6JH, CF23 6NE, CF23 6NX, CF23 6NF, CF23 6NY, CF23 6JX, CF23 6AL.
In the UK, the overall gender distribution is approximately 49% male and 51% female. However, the area surrounding CF23 6JG, has a female population slightly higher than UK average, with 53.5% of residents being female. Several factors can contribute to this. Women generally live longer than men, resulting in a higher proportion of women in neighborhoods with significant elderly populations. Typically, as people grow older, they tend to relocate from city center addresses to suburban areas, smaller towns, and rural locations. Consequently, these areas often have a higher number of females. A higher female population can also be found in areas with industries that employ more women, such as healthcare, education, and retail.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Female | 55.4% | 53.5% | -1.9% | 51.0% | 2.5% |
| Male | 44.6% | 46.5% | 1.9% | 49.0% | -2.5% |
Across the UK, the average relationship status breakdown is roughly 44% married, 38% single, 9% divorced, 6% widowed, and 2% separated.
In the immediate vicinity of CF23 6JG there is a very large concentration of residents that are married - 60.9% of the resident population. In contrast, the average marriage rate across the census is about 44%.
Areas with a high percentage of married residents are typically suburban neighborhoods, towns with good schools and family-friendly amenities, and regions with affordable, spacious housing options. Additionally, such areas can be popular among retirees.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Single | 19.2% | 18.5% | -0.7% | 37.9% | -19.4% |
| Married: Opposite sex | 56.3% | 60.9% | 4.6% | 44.2% | 16.7% |
| Married: Same sex | 0.8% | 0.4% | -0.4% | 0.3% | 0.1% |
| Separated | 0.4% | 0% | -0.4% | 2.2% | -2.2% |
| Divorced | 7.5% | 8% | 0.5% | 9.1% | -1.1% |
| Widowed | 15.8% | 12.2% | -3.6% | 6.1% | 6.1% |
Across the UK, the average 48.4% rated their health as Very Good, 33.6% as Good, 12.7% as Fair, 4% as Bad, and 1.2% as Very Bad.
Population age significantly impacts residents' health. Additionally, socioeconomic status plays a crucial role: higher income levels and lower poverty rates are linked to better health outcomes. Affluent areas benefit from higher living standards, access to private healthcare, and healthier lifestyle choices.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Very good health | 42.1% | 45.7% | 3.6% | 48.4% | -2.7% |
| Good health | 41.7% | 33.8% | -7.9% | 33.6% | 0.2% |
| Fair health | 12.9% | 13.4% | 0.5% | 12.7% | 0.7% |
| Bad health | 3% | 5.2% | 2.2% | 4.0% | 1.2% |
| Very bad health | 0.4% | 1.9% | 1.5% | 1.2% | 0.7% |
During the 2021 census, the educational qualifications of residents across the UK were as follows: 18.2% had no qualifications, 9.6% had 1-4 GCSEs, 13.4% had 5 or more GCSEs and 1-2 A/AS Levels, 16.9% had 2 or more A Levels, 33.8% held a degree (or equivalent), and 5.4% had completed an apprenticeship.
This area stands out for its high percentage of residents with higher education degree or similar. The UK average is 33.8%, while in this area it is 55.3%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| No qualifications | 16.3% | 15.6% | -0.7% | 18.2% | -2.6% |
| 1-4 GCSEs or Equivalent | 5% | 4.2% | -0.8% | 9.6% | -5.4% |
| 5 or more GCSEs, an A-Level or 1-2 AS Levels | 13.3% | 11% | -2.3% | 13.4% | -2.4% |
| Apprenticeship | 2.1% | 0.8% | -1.3% | 5.3% | -4.5% |
| HNC, HND or 2+ A Levels | 9.2% | 9.3% | 0.1% | 16.9% | -7.6% |
| Degree or Similar | 50.8% | 55.3% | 4.5% | 33.8% | 21.5% |
| Other | 3.3% | 3.8% | 0.5% | 2.8% | 1.0% |
This area closely mirrors the overall ethnic composition of the UK, with 84.1% of the population identifying as white, with UK average of 81.4%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Chinese | 0% | 0.4% | 0.4% | 0.7% | -0.3% |
| Indian | 4.8% | 1.5% | -3.3% | 3.1% | -1.6% |
| Pakistani | 0.7% | 5.6% | 4.9% | 2.7% | 2.9% |
| Other Asian | 1.1% | 0.7% | -0.4% | 1.6% | -0.9% |
| Black African | 0% | 0.4% | 0.4% | 2.5% | -2.1% |
| Black Caribbean | 1.1% | 0.4% | -0.7% | 1.0% | -0.6% |
| Mixed White and Asian | 0% | 0.4% | 0.4% | 0.8% | -0.4% |
| Mixed White and Caribbean | 0% | 0.4% | 0.4% | 0.9% | -0.5% |
| Mixed Other | 0.4% | 1.5% | 1.1% | 0.8% | 0.7% |
| White | 90% | 84.1% | -5.9% | 81.4% | 2.7% |
| Arab | 0% | 3.3% | 3.3% | 0.6% | 2.7% |
| Other | 1.8% | 1.5% | -0.3% | 1.6% | -0.1% |
In this area, 89.6% of the population were born in the United Kingdom, which is similar to the UK average of 83.2%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| United Kingdom | 93% | 89.6% | -3.4% | 83.2% | 6.4% |
| European Union | 1.1% | 1.9% | 0.8% | 6.1% | -4.2% |
| Africa | 1.1% | 3.3% | 2.2% | 2.7% | 0.6% |
| Middle East and Asia | 3% | 5.2% | 2.2% | 5.6% | -0.4% |
| The Americas and the Caribbean | 1.5% | 0% | -1.5% | 1.3% | -1.3% |
| Oceania | 0.4% | 0% | -0.4% | 0.3% | -0.3% |
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Born in the UK | 92.6% | 88% | -4.6% | 83.2% | 4.8% |
| 10+ Years | 0% | 8.8% | 8.8% | 9.8% | -1.0% |
| 5-10 Years | 0.4% | 0% | -0.4% | 2.9% | -2.9% |
| Less than 2 years | 7% | 3.3% | -3.7% | 1.9% | 1.4% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| United Kingdom | 91.9% | 76.7% | 15.2% |
| Ireland | 0.4% | 0.6% | -0.2% |
| Portugal | 0.4% | 0.5% | -0.1% |
| Other EU countries | 0.4% | 1.5% | -1.1% |
| North Africa | 1.9% | 0.1% | 1.8% |
| South and Eastern Africa | 0.4% | 0.2% | 0.2% |
| North America and the Caribbean | 0.4% | 0.3% | 0.1% |
| No passport held | 4.4% | 13.5% | -9.1% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| No religion | 26.4% | 37.2% | -10.8% |
| Christian | 57.5% | 46.2% | 11.3% |
| Buddhist | 0.7% | 0.5% | 0.2% |
| Hindu | 0.4% | 1.7% | -1.3% |
| Jewish | 2.6% | 0.5% | 2.1% |
| Muslim | 12.1% | 6.5% | 5.6% |
| Other religion | 0.4% | 0.6% | -0.2% |
Over the last 12 months, the overall crime rate around Llandennis Avenue was 18.1 per 1,000 residents, which is 52.3% lower than the Cyncoed average. The most reported crime type was Violence and sexual offences.
Llandennis Avenue has the 15th lowest crime rate of 68 local areas in Cyncoed and the 146th lowest crime rate of 1,028 local areas in Cardiff .
Violent and sexual offences accounted for around 18.1 crimes per 1,000 residents and have been falling year on year. Over the last decade, overall crime has fallen by about -76.6%.

Households in this area have a higher level of wealth to the average household in England and Wales. 78% of analyzed areas in England and Wales have lower average household annual income than this area.

| Address | Sale Price | Sale Date | Price Estimate 2025 |
|---|---|---|---|
| The Paddock, 20A Llandennis Avenue, Cardiff, Cardiff Detached, an established residential building | £2,000,000 | 2023-01-25 | £2,048,000 |
| 12 Llandennis Avenue, Cardiff, Cardiff Detached, an established residential building | £1,775,000 | 2021-08-11 | £2,067,804 |
| 8 Llandennis Avenue, Cardiff, Cardiff Detached, an established residential building | £1,622,000 | 2021-08-04 | £1,889,565 |
| 2 Llandennis Avenue, Cardiff, Cardiff Detached, an established residential building | £695,000 | 2012-03-23 | £1,237,704 |
| 14 Llandennis Avenue, Cardiff, Cardiff Detached, an established residential building | £1,250,000 | 2007-06-29 | £2,165,821 |
CF23 6JG area has a low unemployment rate. According to Census 2021, 0% residents of this area were unemployed, while the average in the UK was 4.83%. A low level of unemployment in an area indicates a strong job market, where most people who are seeking work can find employment. This generally reflects a healthy economy in the area.
The percentage of retired residents living in CF23 6JG area is much higher than the country's average. According to Census 2011, 48% residents of this area were retired, while the average in the UK was 14%.
| Retired | 115 |
| Full-Time Employee | 54 |
| Self-Employed | 25 |
| Looking after home or family | 12 |
| Student (economically inactive) | 11 |
| Part-Time Employee | 8 |
| Long-Term Sick or disabled | 7 |
| Other | 5 |
| Unemployed | 1 |
| Full-Time Student (with or without job) | 0 |
| Human health and social work activities | 30 |
| Wholesale and retail trade; repair of motor vehicles and motor cycles | 12 |
| Professional, scientific and technical activities | 11 |
| Information and communication | 11 |
| Construction | 8 |
| Public administration and defence; compulsory social security | 8 |
| Education | 7 |
| Accommodation and food service activities | 6 |
| Real estate activities | 5 |
| Other | 4 |
| Administrative and support service activities | 3 |
| Manufacturing | 3 |
| Transport and storage | 2 |
| Financial and insurance activities | 1 |
| Mining and quarrying | 1 |
| Ofsted Overall Effectiveness | Distance | Establishment Type | Has Nursery Classes | Gender | More Info | |
|---|---|---|---|---|---|---|
| Cardiff High School Llandennis Road , Cyncoed CF23 6WG | - not rated | 570 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Rhydypenau Primary School Fidlas Avenue , Llanishen CF14 0NX | - not rated | 708 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Lakeside Primary School Ontario Way , Lakeside CF23 6HB | - not rated | 936 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Springwood Primary School Pennsylvania , Llanedeyrn CF23 9LS | - not rated | 1,014 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| St Phillip Evans R.C. Primary School 134-340 Coed-Y-Gores , Llanedeyrn CF23 9NX | - not rated | 1,425 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
School statistics for this postcode are based on Ofsted rankings.
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Mamas Indian | 58 Clearwater Way, Cyncoed | 648 yd | |
| State of Love & Trust | Ground Floor Commercial Unit 5, Amber Vista Clearwater Way, Cyncoed | 651 yd | |
| Coffee Plus | 16 Rhyd Y Penau Road, Cyncoed | 816 yd | |
| Ostuni | 312 Heathwood Road, Cyncoed | 922 yd | |
| Villaggio lakeside | 5 Fidlas Road, Cyncoed | 957 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Cardiff Golf Club | Cardiff Golf Club Sherborne Avenue, Cyncoed | 814 yd | |
| Hollybush | Hollybush Inn Glyn Coed Road, Pentwyn | 1,030 yd | |
| Three Arches | Three Arches Heathwood Road, Cyncoed | 1,072 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Green Door Bakery | 378 Cyncoed Road, Cyncoed | 729 yd | |
| RAJADHANI | 111 Wern Goch East, Llanedeyrn | 1,030 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| The Co-operative Group | 360 Cyncoed Road, Cyncoed | 692 yd |
This statistics are based on Active Places Data - Contains Data © Sport England
| Percentage of premises that have Superfast Broadband (30Mbit/s or greater) coverage from fixed broadband | 100.0% |
| Percentage of premises that have Ultrafast Broadband (100Mbit/s or greater) coverage from fixed broadband | 100.0% |
| Percentage of premises that have Ultrafast Broadband (300Mbit/s or greater) coverage from fixed broadband | 100.0% |
| Percentage of premises that have coverage from a Gigabit capable service from fixed broadband | 58.3% |
| Percentage of premises unable to receive 2Mbit/s | 0.0% |
| Percentage of premises unable to receive 5Mbit/s | 0.0% |
| Percentage of premises unable to receive 10Mbit/s | 0.0% |
| Percentage of premises unable to receive 30Mbit/s | 0.0% |
| Median download speed | 78 Mbit/s |
| Average download speed | 123.3 Mbit/s |
| Minimum download speed | 323.88 Mbit/s |
| Maximum download speed | 323.88 Mbit/s |
| Median upload speed | 19.8 Mbit/s |
| Average upload speed | 22.8 Mbit/s |
| Maximum upload speed | 49.9 Mbit/s |
Broadband statistics are based on Ofcom's Communications Market Report (CMR) 2022.