Detached
£222,500
80% above the Onllwyn average
20.6% of sales
What is the average house price in Onllwyn? £123,430
The average house price in Onllwyn is £123,430, based on 15 homes sold in the 12 months to September 2026. Prices are down 21.1% (£33,070) on a year earlier.
- 1 year change
- −21.1%
- Sold in 12 months
- 15
- Data up to
- September 2026
Sold prices from HM Land Registry, not asking prices. How we calculate this
How much does each type of property cost in Onllwyn?
Average sold price by property type, and each type's share of recent sales.
Semi-detached
£129,769
5% above the Onllwyn average
64.7% of sales
Terraced
£95,150
23% below the Onllwyn average
14.7% of sales
Are house prices in Onllwyn going up or down?
House prices in Onllwyn are falling: down 21.1% (£33,070) over the past year. Over the past 10 years, prices are up 82.4% (£55,758).
Past 12 months
−21.1%
−£33,070From £156,500 to £123,430
£156,500£123,430
Past 10 years
+82.4%
+£55,758From £67,672 to £123,430
£156,500£67,672
Quick answers for Onllwyn
9 key facts at a glance.
When did prices peak?
£310,000
Highest average, reached in August 2025
How many homes sold?
15
Recorded so far for the 12 months to September 2026
What sells most often?
Semi-detached houses
64.7% of recent sales
What is the most common price range?
£100k - £150k
41.2% of sales
How many people live in Onllwyn?
1,170
280 people per square mile · High (Census 2021)
Population density is High, on a scale from Very Low to Very High.
Usual residents, including communal establishments.
How many households are in Onllwyn?
512
122 households per square mile · High (Census 2021)
Household density is High, on a scale from Very Low to Very High.
Occupied households, not communal establishments.
How much green space is in Onllwyn?
56 m² per resident
More green space per resident than 77% of areas in England and Wales. That's about 7.9 football pitches for every 1,000 residents.
0.6% of the area · 0 public parks. Parks, playing fields, allotments and other public green space, not counting golf courses. Contains OS data © Crown copyright and database right 2026.
What is the crime rate in Onllwyn?
82 crimes per 1,000 residents
Very High · +2.1% on the previous year · 12 months to September 2026
Crime rate is Very High, on a scale from Very Low to Very High.
Contains public sector information licensed under the Open Government Licence v3.0. Source: police.uk.
How does Onllwyn rank?
28th most expensive area of Neath Port Talbot.
Compared with 31 areas
What are the most expensive homes sold in Onllwyn?
The highest recorded sale prices in Onllwyn, from HM Land Registry.
How do house prices in Onllwyn compare with nearby areas?
Onllwyn compared with the 6 nearest other areas in Neath Port Talbot.
Onllwyn vs Glynneath
- Onllwyn
- £123,430
- Glynneath
- £181,843+£58,413
Open comparison
Onllwyn vs Seven Sisters
- Onllwyn
- £123,430
- Seven Sisters
- £136,264+£12,834
Open comparison
Onllwyn vs Blaengwrach
- Onllwyn
- £123,430
- Blaengwrach
- £160,679+£37,249
Open comparison
Onllwyn vs Resolven
- Onllwyn
- £123,430
- Resolven
- £146,714+£23,284
Open comparison
Onllwyn vs Crynant
- Onllwyn
- £123,430
- Crynant
- £220,437+£97,007
Open comparison
Onllwyn vs Clyne and Melincourt
- Onllwyn
- £123,430
- Clyne and Melincourt
- £172,353+£48,923
Open comparison
Thinking of buying in Onllwyn?
There's a lot to think about. Whether it's a home to live in or a buy-to-let, our free checklist walks you through what to check before you make an offer.
What to check before you buyWhere does this data come from?
Price information is from HM Land Registry, location boundaries are from OpenStreetMap, and households and population are from Nomis Census 2021 postcode estimates (21 March 2021). Parks and green space are from OS Open Greenspace. Contains OS data © Crown copyright and database right 2026. Crime is from police.uk street-level data. Contains public sector information licensed under the Open Government Licence v3.0. Source: police.uk.
Last updated 6 November 2026 at 00:25 with the latest Land Registry data (September 2026). The Onllwyn dataset covers 37 postcodes.
Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
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