The median home in Trethomas sells for £245,000
That is the middle of 29 standard sales recorded by HM Land Registry from September 2023 to August 2026, against £277,000 in the typical UK town. Below: what each type of home sells for, the spread of prices, every year since 1995, new builds, the busiest streets and the neighbours. Rents and council tax are on Cost of living.
Half of Trethomas’s sales are semi-detached houses
29 homes sold in three years: 4 detached houses, 15 semi-detached houses and 10 terraced houses.
median sale · 15 sold in 3 years
- Middle half
- £230K–£295K
median sale · 10 sold in 3 years
- Middle half
- £93K–£115K
Detached houses: 4 sold
Too few sales for a card of their own.
A mixed market: no one type makes up more than 52% of sales
Standard sales, Sep 2023 to Aug 2026. A median needs 5 sales of a type; “middle half” is the 25th to 75th percentile of 10 or more.
Hardly any new homes: 0% of sales in the last 12 months
3 new homes have been sold in Trethomas since 1995.
Calendar years with 10 or more sales, then the last 12 months.
0% of sales were leasehold
Nearly every flat in England and Wales is leasehold; among houses, 0% sold leasehold in Trethomas. A leasehold buyer owns the home for a fixed term and may pay ground rent and service charges; check the lease before you buy.
Summerfield Lane is Trethomas’s busiest street, with 8 sales in three years
3 streets had five or more sales from Sep 2023 to Aug 2026. A busy street is often a new estate selling its first homes, or a long road of terraces and flats.
| # | Street | Postcode area | Sales | Median | Homes |
|---|---|---|---|---|---|
| 1 | Summerfield Lane | CF83 | 8 | £276,500 | Mostly semi-detached houses |
| 2 | Ridgeway | CF83 | 5 | £270,000 | Mostly semi-detached houses |
| 3 | St Davids Drive | CF83 | 5 | £265,000 | Mixed |
Standard sales with a street name, grouped by street and postcode district (Sep 2023 to Aug 2026); a name used in two districts shows the district. Medians only: we don’t list individual sales.
Trethomas’s neighbours
Cheaper nearby: Llanbradach, Risca and Abercarn.
| Town | Miles | Median | Sold, 12 mo | Since 2016 |
|---|---|---|---|---|
| Trethomas | — | £245K | 5 | — |
| Bedwas | 1.3 | £242K | 82 | +73% |
| Machen | 1.3 | £250K | 32 | +61% |
| Cwmfelinfach | 1.7 | £157K | 15 | +91% |
| Llanbradach | 2.8 | £174K | 39 | +43% |
| Caerphilly | 2.9 | £240K | 351 | +55% |
| Risca | 3 | £178K | 160 | +66% |
| Abercarn | 4 | £158K | 45 | +53% |
Median: standard sales over three years (10+ needed). Since 2016: the median over three years against 2016’s. Miles: centre to centre.
Questions about property prices in Trethomas
What is the average house price in Trethomas?
The median home in Trethomas sold for £245,000 from September 2023 to August 2026, across 29 standard sales. By type: semi-detached houses £265,000 and terraced houses £94,750.
Sources: HM Land Registry Price Paid, every standard sale since January 1995 (yearly files of 28 September 2026), inside the ONS 2022 built-up-area boundary by postcode (ONS Postcode Directory) · TownRatings grades: our own summary of the data, ranked against UK towns only. All under the Open Government Licence v3.0.
Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0. Postcodes placed with the ONS Postcode Directory (contains OS data © Crown copyright and database right 2026; contains Royal Mail data © Royal Mail copyright and database right 2026).
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.