Allerton Street is in Cardiff and in Cardiff district. CF11 6SJ is located in the Grangetown electoral ward, within the English Parliamentary constituency of Cardiff South and Penarth. This postcode has been in use since 1999-06-01.
StreetScan combines information about Allerton Street, Cardiff, CF11 6SJ and displays a report on the quality of life in this place and its surroundings.
Nearby postcodes are: CF11 6SS, CF11 6RZ, CF11 6SQ, CF11 6RY, CF11 6RS, CF11 6QP, CF11 6SD, CF11 6SB, CF11 6SU.
In the UK, the overall gender distribution is approximately 49% male and 51% female. The area surrounding CF11 6SJ has a slightly higher male population, with 51.9% of residents being male. Several factors can contribute to this, including areas with industries or sectors that predominantly employ men, proximity to universities or technical schools with a higher enrollment of male students, presence of all-male or predominantly male institutions (military academies, boarding schools).
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Female | 49.8% | 48.1% | -1.7% | 51.0% | -2.9% |
| Male | 50.2% | 51.9% | 1.7% | 49.0% | 2.9% |
Across the UK, the average relationship status breakdown is roughly 44% married, 38% single, 9% divorced, 6% widowed, and 2% separated.
In the immediate area around CF11 6SJ, a significant portion of the population is single, making up 53.9% of the residents. On average, approximately 38% of individuals who responded to the census in the UK were single. Areas with higher single populations are typically urban centers, university towns, regions with dynamic job markets, rich cultural offerings and entertainment facilities. These regions also tend to have a younger demographic.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Single | 45.2% | 53.9% | 8.7% | 37.9% | 16.0% |
| Married: Opposite sex | 43.4% | 32.7% | -10.7% | 44.2% | -11.5% |
| Civil partnership: Opposite sex | 0% | 1.2% | 1.2% | 0.1% | 1.1% |
| Separated | 1.2% | 1.2% | 0.0% | 2.2% | -1.0% |
| Divorced | 4.8% | 7.3% | 2.5% | 9.1% | -1.8% |
| Widowed | 5.4% | 3.6% | -1.8% | 6.1% | -2.5% |
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 | 50.6% | 46.1% | -4.5% | 48.4% | -2.3% |
| Good health | 33.5% | 37.9% | 4.4% | 33.6% | 4.3% |
| Fair health | 9.9% | 12.1% | 2.2% | 12.7% | -0.6% |
| Bad health | 5.2% | 3.4% | -1.8% | 4.0% | -0.6% |
| Very bad health | 0.9% | 0.5% | -0.4% | 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.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| No qualifications | 28.3% | 25.8% | -2.5% | 18.2% | 7.6% |
| 1-4 GCSEs or Equivalent | 7.8% | 3.7% | -4.1% | 9.6% | -5.9% |
| 5 or more GCSEs, an A-Level or 1-2 AS Levels | 17.5% | 13.5% | -4.0% | 13.4% | 0.1% |
| Apprenticeship | 3.6% | 3.1% | -0.5% | 5.3% | -2.2% |
| HNC, HND or 2+ A Levels | 7.8% | 13.5% | 5.7% | 16.9% | -3.4% |
| Degree or Similar | 23.5% | 38% | 14.5% | 33.8% | 4.2% |
| Other | 11.4% | 2.5% | -8.9% | 2.8% | -0.3% |
In this area, the population is more ethnically diverse compared to the UK average. While 43% of the residents identify as white, which is lower than the UK average of 81.4%, there are significant representations of other ethnic groups.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Bangladeshi | 12% | 9.2% | -2.8% | 1.1% | 8.1% |
| Chinese | 0.9% | 1% | 0.1% | 0.7% | 0.3% |
| Indian | 7.7% | 8.2% | 0.5% | 3.1% | 5.1% |
| Pakistani | 21% | 19.8% | -1.2% | 2.7% | 17.1% |
| Other Asian | 6.4% | 5.3% | -1.1% | 1.6% | 3.7% |
| Black African | 4.3% | 1.4% | -2.9% | 2.5% | -1.1% |
| Black Caribbean | 0.9% | 1.9% | 1.0% | 1.0% | 0.9% |
| Other Black | 4.7% | 1.9% | -2.8% | 0.5% | 1.4% |
| Mixed White and African | 2.1% | 0.5% | -1.6% | 0.4% | 0.1% |
| Mixed White and Caribbean | 0.4% | 2.4% | 2.0% | 0.9% | 1.5% |
| Mixed Other | 0.9% | 1% | 0.1% | 0.8% | 0.2% |
| White | 38.2% | 43% | 4.8% | 81.4% | -38.4% |
| Arab | 0.4% | 1.9% | 1.5% | 0.6% | 1.3% |
| Other | 0% | 2.4% | 2.4% | 1.6% | 0.8% |
In this area, 68.3% of the population were born in the United Kingdom, which is lower than the UK average of 83.2%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| United Kingdom | 63.5% | 68.3% | 4.8% | 83.2% | -14.9% |
| European Union | 3.9% | 4.9% | 1.0% | 6.1% | -1.2% |
| Rest of Europe | 0% | 0.5% | 0.5% | 0.8% | -0.3% |
| Africa | 6% | 2% | -4.0% | 2.7% | -0.7% |
| Middle East and Asia | 26.2% | 20% | -6.2% | 5.6% | 14.4% |
| The Americas and the Caribbean | 0.4% | 4.4% | 4.0% | 1.3% | 3.1% |
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Born in the UK | 62.2% | 68% | 5.8% | 83.2% | -15.2% |
| 10+ Years | 6.9% | 19.9% | 13.0% | 9.8% | 10.1% |
| 5-10 Years | 8.6% | 4.4% | -4.2% | 2.9% | 1.5% |
| 2-5 Years | 10.3% | 4.4% | -5.9% | 2.2% | 2.2% |
| Less than 2 years | 12% | 3.4% | -8.6% | 1.9% | 1.5% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| United Kingdom | 76.2% | 76.7% | -0.5% |
| Ireland | 0.5% | 0.6% | -0.1% |
| France | 0.5% | 0.3% | 0.2% |
| Portugal | 1% | 0.5% | 0.5% |
| Romania | 0.5% | 0.9% | -0.4% |
| Other EU countries | 3.4% | 1.5% | 1.9% |
| Other Europe | 0.5% | 0.2% | 0.3% |
| Central and Western Africa | 0.5% | 0.3% | 0.2% |
| South and Eastern Africa | 1% | 0.2% | 0.8% |
| Middle East | 0.5% | 0.1% | 0.4% |
| Eastern Asia | 0.5% | 0.3% | 0.2% |
| Southern Asia | 5.8% | 1.2% | 4.6% |
| North America and the Caribbean | 1% | 0.3% | 0.7% |
| Central and South America | 1.5% | 0.2% | 1.3% |
| No passport held | 6.8% | 13.5% | -6.7% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| No religion | 26.6% | 37.2% | -10.6% |
| Christian | 23.7% | 46.2% | -22.5% |
| Buddhist | 0.5% | 0.5% | 0.0% |
| Hindu | 3.9% | 1.7% | 2.2% |
| Jewish | 1.4% | 0.5% | 0.9% |
| Muslim | 32.4% | 6.5% | 25.9% |
| Not answered | 11.6% | 6.0% | 5.6% |
Over the last 12 months, the overall crime rate around Allerton Street was 84.4 per 1,000 residents, which is 28.0% lower than the Grangetown average. The most reported crime type was Violence and sexual offences.
Allerton Street has the 21st lowest crime rate of 41 local areas in Grangetown and the 425th highest crime rate of 1,028 local areas in Cardiff .
Violent and sexual offences accounted for around 53.3 crimes per 1,000 residents and have been rising year on year. Over the last decade, overall crime has fallen by about -22.9%.

Households in this area have a lower level of wealth compared to the average household in England and Wales. 81% of analyzed areas in England and Wales have higher average household annual income than this area.

| Address | Sale Price | Sale Date | Price Estimate 2025 |
|---|---|---|---|
| Flat 2 9 Allerton Street, Cardiff, Cardiff Flats/Maisonettes, an established residential building | £97,500 | 2025-09-02 | £97,500 |
| 10 Allerton Street, Cardiff, Cardiff Terraced, an established residential building | £240,000 | 2024-10-15 | £244,519 |
| 3 Allerton Street, Cardiff, Cardiff Terraced, an established residential building | £235,000 | 2023-09-14 | £243,283 |
| Mitias Coach House, 20A Allerton Street, Cardiff, Cardiff Other, an established residential building | £65,500 | 2023-03-28 | £65,236 |
| 10 Allerton Street, Cardiff, Cardiff Terraced, an established residential building | £200,000 | 2021-05-21 | £239,907 |
The percentage of student residents living in CF11 6SJ area is much higher than the country's average. Usually places with high percentage of students are near Universities and near entertainment places.
| Full-Time Employee | 64 |
| Student (economically inactive) | 17 |
| Looking after home or family | 17 |
| Part-Time Employee | 15 |
| Retired | 13 |
| Self-Employed | 10 |
| Unemployed | 9 |
| Full-Time Student (with or without job) | 9 |
| Long-Term Sick or disabled | 8 |
| Other | 4 |
| Education | 14 |
| Wholesale and retail trade; repair of motor vehicles and motor cycles | 13 |
| Construction | 7 |
| Other | 7 |
| Information and communication | 6 |
| Human health and social work activities | 6 |
| Administrative and support service activities | 5 |
| Financial and insurance activities | 4 |
| Transport and storage | 4 |
| Professional, scientific and technical activities | 4 |
| Accommodation and food service activities | 4 |
| Manufacturing | 3 |
| Public administration and defence; compulsory social security | 3 |
| Water supply; sewerage, waste management and remediation activities | 1 |
| Real estate activities | 1 |
| Ofsted Overall Effectiveness | Distance | Establishment Type | Has Nursery Classes | Gender | More Info | |
|---|---|---|---|---|---|---|
| St Patrick's R.C. Primary School Lucknow Street , Grangetown CF11 6NA | - not rated | 555 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Ninian Park Primary School Virgil Street , Grangetown CF11 8TF | - not rated | 751 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Kitchener Primary School Kitchener Road , Canton CF11 6HT | - not rated | 958 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Grange Town Primary Bromsgrove Street , Grangetown CF11 7XS | - not rated | 1,153 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| St Mary The Virgin C.I.W. Primary School North Church Street , Butetown CF10 5HB | - not rated | 1,222 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 |
|---|---|---|---|
| Tramshed Cardiff | 21 Clare Road, Grangetown | 132 yd | |
| Mama's Caribbean Cuisine | 104 Clare Road, Grangetown | 217 yd | |
| Yummies Desserts | 44 Tudor Street, Riverside | 344 yd | |
| Wings of Glory latin food | 44 Tudor Street, Riverside | 344 yd | |
| Bab AL-Yemen Restaurant and Takeaway | 132 Clare Road, Grangetown | 346 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Sai La Vie | 109 - 111 Clare Road, Grangetown | 231 yd | |
| Cornwall Hotel | The Cornwall, 92 Cornwall Street, Grangetown | 275 yd | |
| The Grange | 134 Penarth Road, Grangetown | 519 yd | |
| The Depot | The Depot Warehouse Williams Way, Butetown | 791 yd | |
| The Cardiff and County Club | Cardiff And County Club Westgate Street, Cathays | 826 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| M A Fish Bar | 46 Cornwall Street, Grangetown | 135 yd | |
| Millennium Fish and Chips | 59 Cornwall Street, Grangetown | 264 yd | |
| Laziza Take-Away | 66 Tudor Street, Riverside | 334 yd | |
| Mr Kebab & Pizza | 56 Tudor Street, Riverside | 335 yd | |
| SR RESTAURANT AND CATERING LTD | 42 Tudor Street, Riverside | 338 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Zaeka Ltd | 36 - 38 Tudor Street, Riverside | 348 yd | |
| Eastern Chinese Supermarket | 26 Tudor Street, Riverside | 366 yd | |
| Tesco | 2 Corporation Road, Grangetown | 583 yd | |
| Tesco Stores Ltd | Ground Floor Commercial Unit 4, Bbc Building Central Square, Cathays | 729 yd | |
| Marks & Spencer Simply Food | M&s Simply Food Central Square, Cathays | 772 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 | 100.0% |
| 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 | 100 Mbit/s |
| Average download speed | 114.2 Mbit/s |
| Minimum download speed | 200 Mbit/s |
| Maximum download speed | 200 Mbit/s |
| Median upload speed | 15 Mbit/s |
| Average upload speed | 14.8 Mbit/s |
| Maximum upload speed | 30.03 Mbit/s |
Broadband statistics are based on Ofcom's Communications Market Report (CMR) 2022.