Ynysddu’s story
Old homes in Ynysddu: 71% built before 1919
71% of its homes were built before 1919, against 15% in the typical UK town.
Explore the history →
YnysdduGwent
A village of 987 in Gwent, Wales.
7 places within 12 milesMap →
Photo: Roger Cornfoot · CC BY-SA 2.0
Population
987
Census 2021 · Caerphilly council
Median home
£155K
35 sales in 3 years
Median age
42.6
20% are 65+ · Gwent 20%
Degree level
24%
of residents 16+ · Wales 31%
Walk, cycle, bus
11%
of commuters · Wales 16%
Is Ynysddu a good place to live?
Ynysddu has fewer than 1,000 residents, too few for fair grades; the figures on this page are still real.
What makes Ynysddu stand out
The 3 things Ynysddu 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.
Band D council tax
Council tax
£2,083 Band D
16% below the typical UK town’s £2,472, 2026–27
The Caerphilly council average. Welsh Government.
The data
Data highlights are ordered by what stands out in Ynysddu.
Work & commute
Fewer commuters in Ynysddu walk, cycle or take the bus or train than in Gwent’s towns or Wales’s towns: 11%
The Census was taken on 21 March 2021, in lockdown, so 21% of workers were mainly at home; shares here are of those who travelled.
In the comparison, Ynysddu comes below both Gwent’s towns (13%) and Wales’s towns (16%). 87% of commuters drove to work at the census.
11%walk, cycle or ride
How commuters got to work · March 2021
Driving87%
On foot7%
Bus2%
Train1%
Bicycle1%
37%
of commuters travel under 5 km · Wales 41%
21%
worked mainly from home in March 2021
£42K
mean household income, before tax
3.5%
of 16 to 64s claim unemployment benefits (2026)
ONS Census 2021, method of travel and distance to work · ONS small-area income · DWP claimant count · OGL
Schools
1 state school in Ynysddu
Its one school is below. Wales publishes no school-level results, so its schools have no letters.
| School | Level | Pupils | Letter |
|---|---|---|---|
| Ynysddu Primary SchoolLargest primary schoolPrimary | Primary | 109 | – |
Welsh Government · schools listThe Schools page →
Housing
A home in Ynysddu sells for £155K, less than in Gwent’s towns or Wales’s towns
For Ynysddu, that is below both Gwent’s towns (£190K) and Wales’s towns (£195K). 9% of households live in social housing.
£155Kmedian sale
Median sale price · Sep 2023 to Aug 2026
Ynysddu£155K
Typical UK town£277K
| By type | Median | Sales |
|---|---|---|
| Terraced | £153,500 | 32 |
73%
of households own their home · Wales 65%
18%
rent privately · Wales 17%
£747
average private rent a month, Caerphilly council area
£2,083
council tax, Band D, 2026–27
HM Land Registry Price Paid · ONS private rents · MHCLG / Welsh Government council tax · ONS Census 2021 tenure · OGL
Safety
Ynysddu records 13.9 burglaries and acts of damage per 1,000 residents a year, against 16.7 in Gwent’s towns and 10.7 in Wales’s towns
Police recorded 79 crimes inside Ynysddu’s built-up area in the 12 months to August 2026, plus 38 reports of anti-social behaviour. Violence came to 30.7 per 1,000 residents a year, below Gwent’s towns (36.7) and close to Wales’s towns (33.8). Violence and sexual offences were 42% of the crimes; the police category includes harassment and stalking.
30.7violent and sexual offences per 1,000 a year
Reports by type · Sep 2025 to Aug 2026
Violence & sexual33
Public order19
Damage & arson18
Vehicle crime4
Other crime2
Other theft1
Drugs1
Robbery1
Anti-social38
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.
30.7
violent and sexual offences per 1,000 residents a year, averaged Sep 2023 to Aug 2026
13.9
burglary, vehicle crime and damage per 1,000 a year, averaged Sep 2023 to Aug 2026
38.8
anti-social behaviour reports per 1,000 (not graded)
79
crimes recorded in the 12 months to August 2026
data.police.uk street-level crime · points inside the ONS built-up-area boundary · OGL
Health
Bad health is more common in Ynysddu than in Gwent’s towns or across Wales’s towns: 8.9% of residents
Ynysddu sits above both Gwent’s towns (7.7%) and Wales’s towns (7.1%) on this measure. Ynysddu has no GP practice of its own; the nearest is 2.1 miles away. These answers aren’t adjusted for age, so young towns look healthier; the Health Grade uses age-adjusted measures, including life expectancy.
76%good or very good health
General health, self-reported
Good or very good 76%Fair 15%Bad or very bad 9%
| Census 2021 | Ynysddu | Gwent | Wales |
|---|---|---|---|
| Good or very good health | 76% | 77% | 78% |
| Bad or very bad health | 8.9% | 7.7% | 7.1% |
| Disabled (Equality Act) | 24% | 22% | 22% |
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 · OGL
History
Old homes shape Ynysddu: 71% were built before 1919, more than in Gwent’s towns or Wales’s towns
The heritage lists give each building’s grade but not its age, so we don’t say which is oldest.
That puts Ynysddu above both Gwent’s towns (26%) and Wales’s towns (27%).
0listed buildings
Listed buildings by grade · Cadw
Grade I0
Grade II*0
Grade II0
0
scheduled monuments
0
registered parks and gardens
71%
of homes built before 1919 · typical UK town 15%
0
listed buildings per 10,000 residents · typical UK town 24
Cadw list, October 2026 · Valuation Office Agency, homes by build period · OGL
Who lives here
Ynysddu has fewer young adults than Gwent’s towns or Wales’s towns: 7.8% are 15 to 24
On this, Ynysddu is below both Gwent’s towns (11%) and Wales’s towns (12%). 19% of residents are children under 15. Half the people of Ynysddu are older than 42.6.
42.6median age
YnysdduGwentWales
Ages · share of residents
20%
Qualifications · residents 16 and older
No qualifications25%
Apprenticeship6%
A levels or similar14%
Degree level24%
Women and men · all residents
51% women, 49% men
About 95 men for every 100 women. Across Wales, 51% of residents are women.
| Ynysddu | Gwent | Wales | |
|---|---|---|---|
| Under 15 | 19% | 18% | 17% |
| 15–24 | 7.8% | 11% | 12% |
| 25–44 | 27% | 26% | 25% |
| 45–64 | 26% | 27% | 26% |
| 65+ | 20% | 20% | 21% |
| No qualifications | 25% | 23% | 20% |
| Apprenticeship | 5.5% | 5.4% | 5.6% |
| A levels or similar | 14% | 16% | 17% |
| Degree level | 24% | 28% | 31% |
ONS Census 2021 · Gwent and Wales: all residents of their built-up areas · OGL
Keep exploring
Everything we know about Ynysddu
13pages on Ynysddu
The big questions
Safety30.7 violent and sexual offences per 1,000 residents a year, averaged Sep 2023 to Aug 2026Cost of livingMedian home £155K · rent £747 a monthHousing12 sold in 12 months · busiest street Alexandra RoadSchools1 state school (no results published in Wales)HealthWork & commute39% of working residents work in the townFlood & hazards0.2% of homes at high or medium flood risk
Famous people from Ynysddu
4 notable people were born in Ynysddu.
Ynysddu’s neighbours
The nearest built-up areas, from ONS’s 2022 boundaries. See them on the map →
CwmfelinfachMaesycwmmerPontllanfraithLlanbradachBedwasTrethomasYstrad MynachYnysddu
How the neighbours grade
| Town | People | Miles | Overall | Cost | Safety | Health |
|---|---|---|---|---|---|---|
| Ynysddu | 987 | — | — | — | — | — |
| Cwmfelinfach | 1,353 | 0.7 | — | A | C | D |
| Maesycwmmer | 2,095 | 2 | — | A− | C | D |
| Pontllanfraith | 9,363 | 2 | C− | B+ | C | D |
| Llanbradach | 3,766 | 2.2 | C | A− | C− | D |
| Bedwas | 6,463 | 2.3 | D | B− | C− | D |
| Trethomas | 1,713 | 2.4 | — | B− | D− | D |
| Ystrad Mynach | 11,856 | 2.6 | C− | A− | D | D |
Cwmfelinfach, Maesycwmmer and Trethomas have fewer than 2,500 residents, so they get subject grades but no overall grade. People: Census 2021. Miles: centre to centre.
Questions about Ynysddu
Is Ynysddu expensive to live in?
Private rents in the Caerphilly council area averaged £747 a month in August 2026.
How much is council tax in Ynysddu?
Band D council tax in Ynysddu is £2,083 for 2026–27, less than in 85% of UK towns (the Caerphilly council average, with police and community councils). Your own bill depends on your home’s band; check it on GOV.UK.
Who lives in Ynysddu?
At the 2021 Census, 7.8% of Ynysddu’s 987 residents were 15 to 24 and 20% were 65 or over, against 12% and 21% across Wales’s towns. More households own their home than across Wales’s towns: 73%, against 65%.
About Ynysddu
Village in Gwent, Wales
Ynysddu is a built-up area of 987 people, in the Caerphilly 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
- 987 (Census 2021)
- Council
- Caerphilly
- County
- Gwent
- Region
- Wales
- Area
- 0.1 sq mi (0.2 km²)
- ONS code
- W45000517
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.