Clas Y Dderwen, Mountain Ash, CF45 4LN

People

Gender

In the UK, the overall gender distribution is approximately 49% male and 51% female. The local area around CF45 4LN is generally consistent with those figures, having a male population of 49.6%.

	2011	2021	10y change (pp)	UK Average	postcode vs UK (pp)
Female	52.4%	50.4%	-2.0%	51.0%	-0.6%
Male	47.6%	49.6%	2.0%	49.0%	0.6%

Partnership Status

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 CF45 4LN, a significant portion of the population is single, making up 47.8% 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	28.6%	47.8%	19.2%	37.9%	9.9%
Married: Opposite sex	50.7%	34.2%	-16.5%	44.2%	-10.0%
Married: Same sex	0%	1.8%	1.8%	0.3%	1.5%
Separated	3.1%	1.8%	-1.3%	2.2%	-0.4%
Divorced	9.7%	9.6%	-0.1%	9.1%	0.5%
Widowed	7.9%	4.9%	-3.0%	6.1%	-1.2%

Health

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.

This area has a high percentage of residents reporting their health as Good or Very Good (85.3%) compared to the average (82%). This typically indicates either a younger population or more affluent area.

	2011	2021	10y change (pp)	UK Average	postcode vs UK (pp)
Very good health	46.9%	56.8%	9.9%	48.4%	8.4%
Good health	32.9%	28.5%	-4.4%	33.6%	-5.1%
Fair health	13.7%	10.5%	-3.2%	12.7%	-2.2%
Bad health	5.1%	3.6%	-1.5%	4.0%	-0.4%
Very bad health	1.4%	0.6%	-0.8%	1.2%	-0.6%

Education and Qualifications

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	24.7%	13.7%	-11.0%	18.2%	-4.5%
1-4 GCSEs or Equivalent	16.7%	6.9%	-9.8%	9.6%	-2.7%
5 or more GCSEs, an A-Level or 1-2 AS Levels	18.9%	17.1%	-1.8%	13.4%	3.7%
Apprenticeship	5.3%	4%	-1.3%	5.3%	-1.3%
HNC, HND or 2+ A Levels	10.1%	19.7%	9.6%	16.9%	2.8%
Degree or Similar	20.7%	36.6%	15.9%	33.8%	2.8%
Other	3.5%	2%	-1.5%	2.8%	-0.8%

Culture

Ethnic Group

In this area, the population is predominantly white, with 98.3% identifying as such, significantly higher than the UK average of 81.4%. This indicates a lower level of ethnic diversity compared to the broader UK population.

	2011	2021	10y change (pp)	UK Average	postcode vs UK (pp)
Chinese	0%	0.2%	0.2%	0.7%	-0.5%
Indian	0%	0.2%	0.2%	3.1%	-2.9%
Other Asian	0%	0.6%	0.6%	1.6%	-1.0%
Black Caribbean	0.3%	0%	-0.3%	1.0%	-1.0%
Other Black	0.3%	0%	-0.3%	0.5%	-0.5%
Mixed White and Asian	0%	0.4%	0.4%	0.8%	-0.4%
Mixed White and Caribbean	0.7%	0%	-0.7%	0.9%	-0.9%
Mixed Other	0%	0.2%	0.2%	0.8%	-0.6%
White	98.3%	98.3%	0.0%	81.4%	16.9%
Gypsy or Irish Traveller	0%	0.2%	0.2%	0.1%	0.1%
Other	0.3%	0%	-0.3%	1.6%	-1.6%

Country of Birth

In this area, 96% of the population were born in the United Kingdom, which is higher than the UK average of 83.2%.

	2011	2021	10y change (pp)	UK Average	postcode vs UK (pp)
United Kingdom	98.3%	96%	-2.3%	83.2%	12.8%
European Union	1%	2.3%	1.3%	6.1%	-3.8%
Rest of Europe	0%	0.4%	0.4%	0.8%	-0.4%
Africa	0.3%	0%	-0.3%	2.7%	-2.7%
Middle East and Asia	0%	0.9%	0.9%	5.6%	-4.7%
The Americas and the Caribbean	0%	0.4%	0.4%	1.3%	-0.9%
Oceania	0.3%	0%	-0.3%	0.3%	-0.3%

Length of Residence

	2011	2021	10y change (pp)	UK Average	postcode vs UK (pp)
Born in the UK	97.9%	96%	-1.9%	83.2%	12.8%
10+ Years	0%	2.5%	2.5%	9.8%	-7.3%
5-10 Years	0.3%	0.8%	0.5%	2.9%	-2.1%
2-5 Years	0%	0.8%	0.8%	2.2%	-1.4%
Less than 2 years	1.7%	0%	-1.7%	1.9%	-1.9%

Passport Held

	2021	UK Average	postcode vs UK (pp)
United Kingdom	86.1%	76.7%	9.4%
Spain	0.2%	0.4%	-0.2%
Poland	0.4%	1.3%	-0.9%
Other EU countries	0.4%	1.5%	-1.1%
Other Europe	0.2%	0.2%	0.0%
Southern Asia	0.6%	1.2%	-0.6%
No passport held	12.2%	13.5%	-1.3%

Religion

	2021	UK Average	postcode vs UK (pp)
No religion	56.7%	37.2%	19.5%
Christian	38.3%	46.2%	-7.9%
Buddhist	0.2%	0.5%	-0.3%
Hindu	0.8%	1.7%	-0.9%
Other religion	0.8%	0.6%	0.2%
Not answered	3.2%	6.0%	-2.8%

Safety

Is Clas Y Dderwen Street dangerous?

Over the last 12 months, the overall crime rate around Clas Y Dderwen was 84.7 per 1,000 residents, which is 12.4% lower than the Mountain Ash average. The most reported crime type was Violence and sexual offences.

Clas Y Dderwen has the 12th lowest crime rate of 23 local areas in Mountain Ash and the 295th highest crime rate of 797 local areas in Rhondda Cynon Taf .

Violent and sexual offences accounted for around 43.3 crimes per 1,000 residents and have been rising year on year. Over the last decade, overall crime has fallen by about -69.9%.

🔎 See full breakdown of local crime, hotspots & trends

Affluence

Household Income

Households in this area have a much lower level of wealth compared to the average household in England and Wales. 91% of analyzed areas in England and Wales have higher average household annual income than this area.

Average Household Income
£33,300

Income Rank
1/10

Household Income in CF45 4LN, Local Authority and Region

Deprivation

Overall Deprivation Rank - 5/10 (average )
The Welsh Index of Multiple Deprivation (WIMD) measures how deprived small areas in Wales are compared to each other. WIMD highlights areas with the highest levels of different types of deprivation. Its main goal is to provide information about the most deprived areas in Wales to help make decisions about funding and local services. It considers the following domains:
Income Deprivation Domain - 5/10 (average )
This domain measures the percentage of people with income below a certain level. It makes up 22% of the overall index.
Employment Deprivation Domain - 5/10 (average )
This domain measures the lack of employment. It includes people of working age who are unable to work due to poor health or who are unemployed but looking for work. This domain makes up 22% of the overall Index.
Health Deprivation Domain - 5/10 (average )
This domain measures poor health. It doesn't have any sub-sections. Some indicators are adjusted for age and sex to account for differences in different areas. This domain makes up 15% of the overall index.
Education Deprivation Domain - 6/10 (average )
This domain measures how much people in an area lack education, training, and skills. It shows the educational disadvantages, like not having qualifications or skills. This domain makes up 14% of the overall index.
Access To Services Deprivation Domain - 7/10 (above average )
This domain measures how deprived a household is if they can't access important services needed for daily life, both in person and online. This includes not being able to get things like food (material deprivation) and not being able to do things like attend after-school activities (social deprivation). Poor access to services can make other types of deprivation worse. This domain counts for 10% of the overall index.
Housing Deprivation Domain - 3/10 (low )
The housing domain aims to identify poor housing based on physical conditions, living conditions, and availability. "Living conditions" means how suitable the housing is for the people living there, including health, safety, and necessary adjustments. This domain makes up 7% of the overall index.
Community Safety Deprivation Domain - 9/10 (very high )
This domain looks at how safe people feel in their community. It includes actual crime and fire incidents, as well as how safe people feel when they are outside in their neighborhood. This domain makes up 5% of the overall index.
Physical Environment Deprivation Domain - 4/10 (below average )
This domain measures things in the local area that might affect the well-being or quality of life of residents. It makes up 5% of the overall index.

Property Prices

Average property prices on Clas Y Dderwen are based on 3 property sales since the beginning of 1995. Estimated property prices are calculated by adjusting the last sale price by current House Price Index for Cynon Valley.
StreetScan downloads house price data directly from the HM Land Registry and uses it to create these statistics.

House Prices for Clas Y Dderwen, Mountain Ash, CF45 4LN

Estimated Average Property Prices for CF45 4LN

Average Price
£187,112

Semi-Detached
£202,616

Terraced
£182,342

Detached
no sales

Flats/Maisonettes
no sales

Other
no sales

Estimated Average Property Prices for Clas Y Dderwen

Average Price
£210,106

Semi-Detached
no sales

Terraced
£210,106

Detached
no sales

Flats/Maisonettes
no sales

Other
no sales

Property Prices Comparison

Latest Property Sales on Clas Y DderwenStreet

Address	Sale Price	Sale Date	Price Estimate 2025
16 Clas Y Dderwen, Mountain Ash, Rhondda Cynon Taff Terraced, an established residential building	£270,000	2024-10-18	£272,160
7 Clas Y Dderwen, Mountain Ash, Rhondda Cynon Taff Terraced, an established residential building	£109,995	2024-01-05	£116,833
11 Clas Y Dderwen, Mountain Ash, Rhondda Cynon Taff Terraced, an established residential building	£113,000	2021-05-21	£138,738
1 Clas Y Dderwen, Mountain Ash, Rhondda Cynon Taff Terraced, an established residential building	£97,500	2020-08-07	£136,690
17 Clas Y Dderwen, Mountain Ash, Rhondda Cynon Taff Semi-Detached, an established residential building	£109,000	2019-01-16	£161,110

View All Property Sales and Other Statistics for CF45 4LN

Employment

CF45 4LN area has a low unemployment rate. According to Census 2021, 2% 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.

Economic Activity

Full-Time Employee	213
Retired	85
Part-Time Employee	54
Self-Employed	34
Long-Term Sick or disabled	14
Other	11
Looking after home or family	11
Full-Time Student (with or without job)	10
Student (economically inactive)	10
Unemployed	8

Employment Industry

Wholesale and retail trade; repair of motor vehicles and motor cycles	19
Manufacturing	18
Public administration and defence; compulsory social security	15
Human health and social work activities	15
Construction	13
Education	13
Other	8
Accommodation and food service activities	7
Water supply; sewerage, waste management and remediation activities	3
Information and communication	3
Financial and insurance activities	3
Administrative and support service activities	2
Real estate activities	2
Professional, scientific and technical activities	2
Transport and storage	1

Schools

Not applicable

	Ofsted Overall Effectiveness	Distance	Establishment Type	Has Nursery Classes	Gender	More Info
Caegarw Primary School Troed Y Rhiw Road , Caegarw CF45 4BH	- not rated	311 yd	Welsh establishment	Not Applicable	Not applicable	More About School
Our Lady's R.C. Primary School Miskin Road , Miskin CF45 3UA	- not rated	472 yd	Welsh establishment	Not Applicable	Not applicable	More About School
Darrenlas Primary School Kingcraft Street , Darrenlas CF45 3LT	- not rated	784 yd	Welsh establishment	Not Applicable	Not applicable	More About School
Miskin Primary School York Street , Miskin CF45 3BG	- not rated	1,016 yd	Welsh establishment	Not Applicable	Not applicable	More About School
Pengeulan Primary School Penrhiwceiber Road , Miskin CF45 3UW	- not rated	1,146 yd	Welsh establishment	Not Applicable	Not applicable	More About School

School statistics for this postcode are based on Ofsted rankings.

Food and Drink

Restaurants, Cafes, Canteens

Business Name	Address	Distance
The Little Rose Tea Room	The Hub, The Old Day Centre, Oxford Street	424 yd
Kalan	76 Oxford Street	495 yd
Stardust	21b Oxford Street	534 yd
Sugar Rush	20 Oxford Street	542 yd
Providence Baptist Church	Union Street	652 yd

Pubs, Bars, Nightclubs

Business Name	Address	Distance
The George Inn	31 Cardiff Road	172 yd
Mountain Ash Workingmens Club	Oxford Street	424 yd
Nixons Workingmens Social Club	Oxford Street	436 yd
The Jeffrey Arms	Jeffrey Street	508 yd
The Butchers Arms	10 Allen Street	520 yd

Takeaway, Sandwich Shops

Business Name	Address	Distance
MusTaffas	27b Oxford Street	489 yd
The Friery	30 Oxford Street	495 yd
Tasty Kebab	29 Oxford Street	495 yd
Scoffers	9 Allen Street	520 yd
Little India	25B Oxford Street	526 yd

Supermarkets, Hypermarkets

Business Name	Address	Food hygiene rating	Distance
Iceland Frozen Foods Plc	63-65 Oxford Street		424 yd

Sport

We haven't found any sport facilities near CF45 4LN postcode.

Broadband

Technology Aviability

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	0.0%
Percentage of premises that have Ultrafast Broadband (300Mbit/s or greater) coverage from fixed broadband	0.0%
Percentage of premises that have coverage from a Gigabit capable service from fixed broadband	0.0%

Speed Aviability

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%

Download Speed

Median download speed	53.3 Mbit/s
Average download speed	48.6 Mbit/s
Minimum download speed	61.36 Mbit/s
Maximum download speed	61.36 Mbit/s

Upload Speed

Median upload speed	16.9 Mbit/s
Average upload speed	14.8 Mbit/s
Maximum upload speed	20 Mbit/s

Broadband statistics are based on Ofcom's Communications Market Report (CMR) 2022.