Trelewis’s story
2 listed buildings, 1 of them Grade I
Cadw lists them inside Trelewis’ built-up area.
34% of its homes were built before 1919, against 15% in the typical UK town.
Explore the history →
TrelewisMid Glamorgan
9% of commuters get to work on foot, by bike or by public transport. The village, home to 2,022 people, lies in Mid Glamorgan, Wales.
7 places within 12 milesMap →
Llancaiach-fawr · Photo: Rose Cottage · Public domain
Population
2,022
Census 2021 · Merthyr Tydfil council
Median home
£155K
74 sales in 3 years
Median age
37.1
16% are 65+ · Mid Glamorgan 20%
Degree level
27%
of residents 16+ · Wales 31%
Walk, cycle, bus
9%
of commuters · Wales 16%
Is Trelewis a good place to live?
Trelewis’s strongest is hazard risk (B+). Where it falls short is health — 8.4% of residents report bad or very bad health, and 20.5% are disabled. It also trails on jobs & income (C−): mean household income £44,005; 2.3% of 16 to 64s claim unemployment benefits. At a median £154,500, a home costs 3.8 times the yearly income of households in the Merthyr Tydfil council area.
Figures: flood risk, Natural Resources Wales · health, Census 2021 (the grade adjusts for age) · income, ONS · claimants, DWP · prices, HM Land Registry, the last three years. Trelewis is graded on each subject, but towns under 2,500 get no overall grade.
This town's Health Grade uses ONS's small-area life expectancy and healthy life expectancy for 2019 to 2023, and two Census 2021 measures, bad health and disability, adjusted for age. English towns' grades also use OHID's small-area early deaths, hospital admissions and child obesity, which OHID publishes for England only.
What makes Trelewis stand out
The 3 things Trelewis does most differently from other towns.
Homes built before 1919
History
Against 15% in the typical UK town
Valuation Office Agency, homes by build period.
Median sale, £ thousands
Housing
44% below the typical UK town’s £277K
Standard sales, September 2023 to August 2026.
Walk, cycle or public transport
Getting around
9% leave the car
of commuters walk, cycle or take public transport (Wales’s towns 16%)
How Trelewis grades
Each subject compared with the 2,160 UK towns with an overall grade (schools within Wales), ordered by how far Trelewis is from typical. American towns are graded separately.
Trelewis is graded on each subject, but towns under 2,500 get no overall grade.
Health8.4% in bad or very bad health, 20% disabled (adjusted for age in the grade)DOpen →WalkabilityGraded on how easily people get around without a carC−Open →Jobs & incomeIncomes and work trail most townsC−Open →Hazard risk0% of homes at high or medium risk of flooding from rivers or the seaB+Open →SafetyBelow the middle of the towns comparedCOpen →Cost of livingNear typical for the towns comparedB−Open →
SchoolsNot published in Wales–
Character Graded, but not part of the overall grade.
History2 listed buildings, 1 Grade IC+Open →Outdoors100% live within 400 m of a park; 2.6 ha of public green space per 1,000 residentsB−Open →Civic life1 local charities per 1,000 residents; 31% live within 1 km of a libraryC−Open →
How TownRatings grades towns →
The data
Data highlights are ordered by what stands out in Trelewis.
Health
People in Trelewis live shorter lives than in 88% of UK towns
Trelewis has no GP practice of its own; the nearest is 0.3 miles away. A disability affects 20% of people here. The nearest A&E to Trelewis is Prince Charles Hospital, 7.7 miles away.
79%good or very good healthDHealth Grade
General health, self-reported
Good or very good 79%Fair 13%Bad or very bad 8%
| Census 2021 | Trelewis | Mid Glamorgan | Wales |
|---|---|---|---|
| Good or very good health | 79% | 77% | 78% |
| Bad or very bad health | 8.4% | 8.2% | 7.1% |
| Disabled (Equality Act) | 20% | 23% | 22% |
77
life expectancy at birth, men (2019–23)
80.8
life expectancy at birth, women
Welsh towns’ Health Grades use ONS’s small-area life expectancy and healthy life expectancy for 2019 to 2023, and two Census 2021 measures, bad health and disability, adjusted for age. English towns’ also use OHID’s small-area early deaths, hospital admissions and child obesity, which OHID publishes for England only.
ONS Census 2021, general health and disability · ONS, life expectancy 2019–23 · OGL · Read these answers with age in mind: they aren’t adjusted, so younger places do better. The Health Grade uses age-adjusted measures, life expectancy among them.
Schools
1 state school in Trelewis
It is shown below. The town’s primary school has 244 pupils.
| School | Level | Pupils | Letter |
|---|---|---|---|
| Trelewis Primary SchoolLargest primary schoolPrimary | Primary | 244 | – |
Welsh Government · schools list · Wales publishes no school-level results, so its schools have no letters.The Schools page →
Work & commuteJobs & income grade C−
Under 5 km to work: 21% in Trelewis, fewer than in both Mid Glamorgan’s towns and Wales’s towns
The Census was taken on 21 March 2021, in lockdown, so 17% of workers were mainly at home; shares here are of those who travelled.
The car took nine in ten commuters, above both Mid Glamorgan’s towns (85%) and Wales’s towns (81%). The 2026 claimant rate among 16 to 64s was 2.3%. About 3% of its commuters stay in Trelewis for work. The town counts 0.1 jobs per working resident.
9%walk, cycle or ride
How commuters got to work · March 2021
Driving90%
On foot5%
Bus3%
Train2%
21%
of commuters travel under 5 km · Wales 41%
17%
worked mainly from home in March 2021
£44K
mean household income, before tax
2.3%
of 16 to 64s claim unemployment benefits (2026)
C−
Walkability: more walkable than 20% of UK towns
ONS Census 2021, method of travel and distance to work · ONS small-area income · DWP claimant count · OGL
Safety
Homes in Trelewis see more burglary and damage than in Mid Glamorgan’s towns or Wales’s towns: 14.8 per 1,000 a year
Violence came to 28.4 per 1,000 residents a year, below Mid Glamorgan’s towns (36.7) and Wales’s towns (33.8) alike. The 12 months to August 2026 brought 113 recorded crimes inside Trelewis’s built-up area, and 22 reports of anti-social behaviour. Among the 1,541 UK towns of 1,000 to 2,500 people, Trelewis has more crime per resident than 86% of them. 50% of the crimes fell under violence and sexual offences.
28.4violent and sexual offences per 1,000 a yearCSafety Grade
Compared with UK towns its sizeLess crime per resident than 14% of the 1,541 UK towns of 1,000 to 2,500 people: more crime than most for its size. Context only, not part of the grade.
Reports by type · Sep 2025 to Aug 2026
Violence & sexual56
Damage & arson15
Public order13
Other theft9
Vehicle crime8
Other crime8
Burglary2
Weapons1
Anti-social22
Not gradedAnti-social behaviour, shoplifting and other theft are shown but left out of the Safety Grade, which counts violence and crimes against homes and vehicles per resident.
28.4
violent and sexual offences per 1,000 residents a year, averaged Sep 2023 to Aug 2026
14.8
burglary, vehicle crime and damage per 1,000 a year, averaged Sep 2023 to Aug 2026
12.7
anti-social behaviour reports per 1,000 (not graded)
113
crimes recorded in the 12 months to August 2026
data.police.uk street-level crime · points inside the ONS built-up-area boundary · OGL · The police category of violence and sexual offences includes harassment and stalking.
History
Llancaiach-fawr (Grade I) heads Trelewis’s short list of listed buildings
The heritage lists give each building’s grade but not its age, so we don’t say which is oldest.
The pre-1919 share of homes is 34%. Trelewis has 10 listed buildings for every 10,000 residents, between Mid Glamorgan’s towns (8) and Wales’s towns (18).
2listed buildingsC+History Grade
Listed buildings by grade · Cadw
Grade I1
Grade II*0
Grade II1
Among them · Grade I
- Llancaiach-fawr Grade I
0
scheduled monuments
0
registered parks and gardens
34%
of homes built before 1919 · typical UK town 15%
10
listed buildings per 10,000 residents · typical UK town 24
Cadw list, October 2026 · Valuation Office Agency, homes by build period · OGL
HousingCost of living grade B−
Few households rent privately in Trelewis: 12%, fewer than in both Mid Glamorgan’s towns and Wales’s towns
Owners make up 70% of households, near Mid Glamorgan’s towns (68%) and higher than Wales’s towns (65%). Private rents average £754 a month across the Merthyr Tydfil council area. The median sale, £154,500, comes from 74 standard sales inside Trelewis’s built-up area from September 2023 to August 2026.
£155Kmedian sale
Median sale price · Sep 2023 to Aug 2026
Trelewis£155K
Typical UK town£277K
| By type | Median | Sales |
|---|---|---|
| Detached | £370,000 | 16 |
| Semi-detached | £149,950 | 27 |
| Terraced | £130,750 | 30 |
70%
of households own their home · Wales 65%
12%
rent privately · Wales 17%
£754
average private rent a month, Merthyr Tydfil council area
£2,594
council tax, Band D, 2026–27
HM Land Registry Price Paid · ONS private rents · MHCLG / Welsh Government council tax · ONS Census 2021 tenure · OGL
Who lives here
Children make up 21% of Trelewis, above Mid Glamorgan’s towns and Wales’s towns
16% of residents are 65 or over, and people aged 15 to 24 make up 9.7% of the town, below both Mid Glamorgan’s towns (11%) and Wales’s towns (12%). The middle age in Trelewis is 37.1. Graduates make up 27% of adults.
37.1median age
TrelewisMid GlamorganWales
Ages · share of residents
10%
Qualifications · residents 16 and older
No qualifications24%
Apprenticeship5%
A levels or similar17%
Degree level27%
Women and men · all residents
50% women, 50% men
About an even split. Across Wales, 51% of residents are women.
| Trelewis | Mid Glamorgan | Wales | |
|---|---|---|---|
| Under 15 | 21% | 17% | 17% |
| 15–24 | 9.7% | 11% | 12% |
| 25–44 | 30% | 25% | 25% |
| 45–64 | 23% | 27% | 26% |
| 65+ | 16% | 20% | 21% |
| No qualifications | 24% | 24% | 20% |
| Apprenticeship | 5% | 5.3% | 5.6% |
| A levels or similar | 17% | 16% | 17% |
| Degree level | 27% | 28% | 31% |
ONS Census 2021 · Mid Glamorgan and Wales: all residents of their built-up areas · OGL
Keep exploring
Everything we know about Trelewis
15pages on Trelewis
The big questions
SafetyC28.4 violent and sexual offences per 1,000 residents a year, averaged Sep 2023 to Aug 2026Cost of livingB−Median home £155K · rent £754 a monthHousing18 sold in 12 months · busiest street High StreetSchools1 state school (no results published in Wales)HealthDWork & commuteC−37% of working residents work in the townFlood & hazardsB+0% of homes at high or medium flood risk
Out and about
Famous people from Trelewis
3 notable people were born in Trelewis.
Trelewis’s neighbours
The nearest built-up areas, from ONS’s 2022 boundaries. See them on the map →
TreharrisNelsonGelligaerAbercynonPen-pedair-heolBedlinogAberfanTrelewis
How the neighbours grade
| Town | People | Miles | Overall | Cost | Safety | Health |
|---|---|---|---|---|---|---|
| Trelewis | 2,022 | — | — | B− | C | D |
| Treharris | 5,042 | 0.6 | D | B− | C+ | D |
| Nelson | 4,235 | 1.2 | C | B+ | C | D |
| Gelligaer | 1,436 | 1.7 | — | A | D− | D− |
| Abercynon | 6,376 | 2 | D | B+ | C− | D− |
| Pen-pedair-heol | 3,787 | 2.3 | C+ | B+ | B+ | D |
| Bedlinog | 1,098 | 2.6 | — | B− | C− | D− |
| Aberfan | 2,431 | 2.8 | — | B− | C− | D− |
Gelligaer, Bedlinog and Aberfan have fewer than 2,500 residents, so they get subject grades but no overall grade. People: Census 2021. Miles: centre to centre.
Questions about Trelewis
How many listed buildings are there in Trelewis?
2 on Cadw’s list, 1 of them Grade I. Its Grade I building is Llancaiach-fawr.
Is Trelewis safe?
Burglary was rare, with 2 reports in the year.
Is Trelewis expensive to live in?
Homes cost less than in most UK towns: the median sale over three years was £154,500, against £277,000 in the typical UK town. By type: terraced houses £130,750, semi-detached houses £149,950 and detached houses £370,000.
About Trelewis
Village in Mid Glamorgan, Wales
Trelewis is a built-up area of 2,022 people, in the Merthyr Tydfil council area. TownRatings uses ONS’s 2022 built-up areas as towns: the physical town, as people mean the word, rather than a council district, so its figures cover the town itself.
Built from ONS geography and Census 2021
- Population
- 2,022 (Census 2021)
- Council
- Merthyr Tydfil
- County
- Mid Glamorgan
- Region
- Wales
- Area
- 0.2 sq mi (0.6 km²)
- ONS code
- W45000477
Sources: ONS Census 2021, output areas summed to the ONS 2022 built-up area · HM Land Registry Price Paid (standard sales, September 2023 to August 2026) · ONS Price Index of Private Rents (August 2026, by council) · MHCLG and Welsh Government council tax, Band D 2026–27 (with parish precepts in England) · data.police.uk street-level crime, 36 months to August 2026, points inside the built-up-area boundary · ONS small-area life expectancy and healthy life expectancy, 2019 to 2023 (England and Wales), OHID Fingertips small-area indicators (England) and Census 2021 health, adjusted for age · ONS small-area income estimates (financial year ending 2023) · DWP claimant count via Nomis (January to August 2026) · Cadw listed buildings, scheduled monuments and registered historic parks and gardens via DataMapWales, October 2026, inside the ONS 2022 built-up-area boundary · Valuation Office Agency, Council Tax: stock of properties by build period (31 March 2025) · TownRatings grades: our own summary of the data, ranked against UK towns only. All under the Open Government Licence v3.0.
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.