Colchester Avenue is in Penylan, Cardiff and in Cardiff district. CF23 9AY is located in the Penylan electoral ward, within the English Parliamentary constituency of Cardiff Central. This postcode has been in use since 1999-06-01.
StreetScan combines information about Colchester Avenue, Penylan, Cardiff, CF23 9AY and displays a report on the quality of life in this place and its surroundings.
Nearby postcodes are: CF23 9AG, CF23 9BX, CF23 9AJ, CF23 9AH, CF23 9BY, CF23 9FE, CF23 9HJ, CF23 9FD, CF23 9AP.
In the UK, the overall gender distribution is approximately 49% male and 51% female. However, the area surrounding CF23 9AY has a female population much higher than UK average, with 56.9% of the population 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 | 57.6% | 56.9% | -0.7% | 51.0% | 5.9% |
| Male | 42.4% | 43.1% | 0.7% | 49.0% | -5.9% |
Across the UK, the average relationship status breakdown is roughly 44% married, 38% single, 9% divorced, 6% widowed, and 2% separated.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Single | 23.4% | 34.5% | 11.1% | 37.9% | -3.4% |
| Married: Opposite sex | 45.8% | 45.5% | -0.3% | 44.2% | 1.3% |
| Separated | 5% | 0.9% | -4.1% | 2.2% | -1.3% |
| Divorced | 14.4% | 12.2% | -2.2% | 9.1% | 3.1% |
| Widowed | 11.4% | 6.8% | -4.6% | 6.1% | 0.7% |
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 | 37.9% | 48.3% | 10.4% | 48.4% | -0.1% |
| Good health | 28.4% | 28.8% | 0.4% | 33.6% | -4.8% |
| Fair health | 18.9% | 14% | -4.9% | 12.7% | 1.3% |
| Bad health | 10.7% | 7.1% | -3.6% | 4.0% | 3.1% |
| Very bad health | 4.1% | 1.7% | -2.4% | 1.2% | 0.5% |
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 43.5%.
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| No qualifications | 34.8% | 17.3% | -17.5% | 18.2% | -0.9% |
| 1-4 GCSEs or Equivalent | 13.9% | 8.3% | -5.6% | 9.6% | -1.3% |
| 5 or more GCSEs, an A-Level or 1-2 AS Levels | 15.4% | 13.7% | -1.7% | 13.4% | 0.3% |
| Apprenticeship | 5.5% | 3.3% | -2.2% | 5.3% | -2.0% |
| HNC, HND or 2+ A Levels | 5% | 11.6% | 6.6% | 16.9% | -5.3% |
| Degree or Similar | 19.4% | 43.5% | 24.1% | 33.8% | 9.7% |
| Other | 6% | 2.4% | -3.6% | 2.8% | -0.4% |
In this area, the population is more ethnically diverse compared to the UK average. While 63.3% 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 | 2.1% | 1.4% | -0.7% | 1.1% | 0.3% |
| Chinese | 1.2% | 7.7% | 6.5% | 0.7% | 7.0% |
| Indian | 4.1% | 6.7% | 2.6% | 3.1% | 3.6% |
| Pakistani | 1.2% | 0.2% | -1.0% | 2.7% | -2.5% |
| Other Asian | 0.8% | 3.4% | 2.6% | 1.6% | 1.8% |
| Black African | 0.8% | 1.9% | 1.1% | 2.5% | -0.6% |
| Black Caribbean | 1.2% | 1.2% | 0.0% | 1.0% | 0.2% |
| Mixed White and Asian | 1.6% | 1.4% | -0.2% | 0.8% | 0.6% |
| Mixed White and African | 0.4% | 0% | -0.4% | 0.4% | -0.4% |
| Mixed White and Caribbean | 1.2% | 2.6% | 1.4% | 0.9% | 1.7% |
| Mixed Other | 0.8% | 1.2% | 0.4% | 0.8% | 0.4% |
| White | 82.7% | 63.3% | -19.4% | 81.4% | -18.1% |
| Arab | 1.2% | 4.6% | 3.4% | 0.6% | 4.0% |
| Other | 0.4% | 4.3% | 3.9% | 1.6% | 2.7% |
In this area, 71.9% 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 | 87.2% | 71.9% | -15.3% | 83.2% | -11.3% |
| European Union | 0.8% | 5.7% | 4.9% | 6.1% | -0.4% |
| Rest of Europe | 0% | 1% | 1.0% | 0.8% | 0.2% |
| Africa | 3.7% | 3.1% | -0.6% | 2.7% | 0.4% |
| Middle East and Asia | 6.6% | 15.5% | 8.9% | 5.6% | 9.9% |
| The Americas and the Caribbean | 1.2% | 2.4% | 1.2% | 1.3% | 1.1% |
| Oceania | 0.4% | 0.2% | -0.2% | 0.3% | -0.1% |
| British Overseas | 0% | 0.2% | 0.2% | 0.0% | 0.2% |
| 2011 | 2021 | 10y change (pp) | UK Average | postcode vs UK (pp) | |
|---|---|---|---|---|---|
| Born in the UK | 86.8% | 71.7% | -15.1% | 83.2% | -11.5% |
| 10+ Years | 0.8% | 17.8% | 17.0% | 9.8% | 8.0% |
| 5-10 Years | 0.8% | 5.5% | 4.7% | 2.9% | 2.6% |
| 2-5 Years | 2.1% | 1.4% | -0.7% | 2.2% | -0.8% |
| Less than 2 years | 9.5% | 3.6% | -5.9% | 1.9% | 1.7% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| United Kingdom | 82.6% | 76.7% | 5.9% |
| Ireland | 0.7% | 0.6% | 0.1% |
| Spain | 0.5% | 0.4% | 0.1% |
| Poland | 0.2% | 1.3% | -1.1% |
| Romania | 1.9% | 0.9% | 1.0% |
| Other EU countries | 0.2% | 1.5% | -1.3% |
| Turkey | 0.7% | 0.1% | 0.6% |
| Central and Western Africa | 0.2% | 0.3% | -0.1% |
| South and Eastern Africa | 0.2% | 0.2% | 0.0% |
| Middle East | 1.2% | 0.1% | 1.1% |
| Eastern Asia | 1.2% | 0.3% | 0.9% |
| South-East Asia | 0.5% | 0.2% | 0.3% |
| North America and the Caribbean | 0.5% | 0.3% | 0.2% |
| Central and South America | 1.2% | 0.2% | 1.0% |
| No passport held | 8.1% | 13.5% | -5.4% |
| 2021 | UK Average | postcode vs UK (pp) | |
|---|---|---|---|
| No religion | 28.3% | 37.2% | -8.9% |
| Christian | 45.2% | 46.2% | -1.0% |
| Buddhist | 1.7% | 0.5% | 1.2% |
| Hindu | 5% | 1.7% | 3.3% |
| Muslim | 12.1% | 6.5% | 5.6% |
| Sikh | 0.7% | 0.9% | -0.2% |
| Other religion | 0.2% | 0.6% | -0.4% |
| Not answered | 6.7% | 6.0% | 0.7% |
Over the last 12 months, the overall crime rate around Colchester Avenue was 479.2 per 1,000 residents, which is 412.6% higher than the Penylan average. The most reported crime type was Shoplifting.
Colchester Avenue has the 2nd highest crime rate of 36 local areas in Penylan and the 30th highest crime rate of 1,028 local areas in Cardiff .
Violent and sexual offences accounted for around 143.5 crimes per 1,000 residents and have been rising year on year. Over the last decade, overall crime has risen by about 65.7%.

Households in this area have a slightly higher level of wealth to the average household in England and Wales. 64% of analyzed areas in England and Wales have lower average household annual income than this area.

| Address | Sale Price | Sale Date | Price Estimate 2025 |
|---|---|---|---|
| 103 Colchester Avenue, Cardiff, Cardiff Terraced, an established residential building | £232,500 | 2023-10-02 | £239,970 |
| 115 Colchester Avenue, Cardiff, Cardiff Detached, an established residential building | £590,000 | 2022-09-28 | £615,861 |
| 87 Colchester Avenue, Cardiff, Cardiff Semi-Detached, an established residential building | £307,500 | 2022-08-08 | £327,915 |
| 111 Colchester Avenue, Cardiff, Cardiff Detached, an established residential building | £480,000 | 2022-06-14 | £515,220 |
| 91 Colchester Avenue, Cardiff, Cardiff Terraced, an established residential building | £224,000 | 2021-10-26 | £259,901 |
CF23 9AY area has a low unemployment rate. According to Census 2021, 3% 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.
| Full-Time Employee | 101 |
| Retired | 76 |
| Part-Time Employee | 35 |
| Long-Term Sick or disabled | 34 |
| Self-Employed | 29 |
| Student (economically inactive) | 22 |
| Looking after home or family | 15 |
| Unemployed | 11 |
| Other | 7 |
| Full-Time Student (with or without job) | 7 |
| Wholesale and retail trade; repair of motor vehicles and motor cycles | 15 |
| Education | 12 |
| Manufacturing | 9 |
| Construction | 8 |
| Human health and social work activities | 8 |
| Public administration and defence; compulsory social security | 5 |
| Financial and insurance activities | 5 |
| Other | 3 |
| Information and communication | 3 |
| Transport and storage | 2 |
| Professional, scientific and technical activities | 2 |
| Electricity, gas, steam and air conditioning supply | 2 |
| Administrative and support service activities | 2 |
| Real estate activities | 1 |
| Ofsted Overall Effectiveness | Distance | Establishment Type | Has Nursery Classes | Gender | More Info | |
|---|---|---|---|---|---|---|
| Stacey Primary School Stacey Road , Roath CF24 1DW | - not rated | 937 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Llanedeyrn Primary School Wellwood , Llanedeyrn CF23 9JN | - not rated | 1,247 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Ysgol Y Berllan Deg Circle Way East , Llanederyrn CF23 9LD | - not rated | 1,322 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Albany Primary School Albany Road , Roath CF24 3RR | - not rated | 1,322 yd | Welsh establishment | Not Applicable | Not applicable | More About School |
| Roath Park Primary School Penywain Road , Roath Park CF24 4BB | - not rated | 1,343 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 |
|---|---|---|---|
| Bean's To Coffee | 1 - 3, Lady Margaret Court Colchester Avenue, Penylan | 197 yd | |
| Waterloo Tea | 5 Waterloo Gardens, Penylan | 478 yd | |
| Penylan Pantry | 72A Kimberley Road, Penylan | 630 yd | |
| Burger King Drive Through Restaurant | 473 Newport Road, Penylan | 632 yd | |
| Taco Bell | Unit 4, Dragon Retail Park Newport Road, Penylan | 668 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| St Peters Rugby Football Club Ltd | St Peters Rfc Minster Road, Roath | 572 yd | |
| The Penylan Bowling Club | Penylan Bowling & Lawn Tennis Club Marlborough Road, Roath | 721 yd | |
| Claude Hotel | The Claude, 140 Albany Road, Roath | 1,013 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Penylan Fish Bar | 6, Lady Margaret Court Colchester Avenue, Penylan | 214 yd | |
| Waterloo Tea (Rangers Hut) | Waterloo Gardens Waterloo Gardens, Penylan | 302 yd | |
| Linas Kitchen | Unit 2b Beresford Road Lane, Adamsdown | 816 yd | |
| Minto's Patisserie | Unit 2 Beresford Road Lane, Adamsdown | 821 yd | |
| Greggs Plc | Greggs Unit 7, Avenue Retail Park Newport Road, Penylan | 860 yd |
| Business Name | Address | Food hygiene rating | Distance |
|---|---|---|---|
| Sainsbury's | Sainsbury's Colchester Avenue, Penylan | 340 yd | |
| Lidl | Lidl Store Colchester Avenue, Penylan | 527 yd | |
| Morrisons | Dragon Retail Park Newport Road, Penylan | 668 yd | |
| Food Warehouse | City Link Newport Road, Adamsdown | 747 yd | |
| Home Bargains | Unit 3c, City Link Newport Road, Adamsdown | 767 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 | 200 Mbit/s |
| Average download speed | 209 Mbit/s |
| Minimum download speed | 500 Mbit/s |
| Maximum download speed | 500 Mbit/s |
| Median upload speed | 20 Mbit/s |
| Average upload speed | 22 Mbit/s |
| Maximum upload speed | 35 Mbit/s |
Broadband statistics are based on Ofcom's Communications Market Report (CMR) 2022.