Our Data Sources
20, Castle Square, Merthyr Tydfil has no recent1 records in the Land Registry and a single entry in the EPC database dated February 2026.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 4 out of 5 and is considered of high accuracy.
1Sales dated prior to 2007 are shown, but are not used in our calculations.
Price Range & Condition
In very good condition, we estimate 20, Castle Square, Merthyr Tydfil would be worth £112,858, with a potential rental value of £724 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £99,960, with a rental value of £641 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
20, Castle Square, Merthyr Tydfil occupies a 39 m2 plot as recorded by HM Land Registry.
Of the 26 other houses in this postcode, 21 have recorded plot sizes, and this one ranks as the 17th largest.
Energy Efficiency
20, Castle Square, Merthyr Tydfil has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 09 Feb 2026.
The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).
Sold Prices
20, Castle Square, Merthyr Tydfil last changed hands on 22nd November 2002, selling for £26,850. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
- Sold Nov 2002£26,850
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 36 sales of comparable properties within 770 metres of 20, Castle Square, Merthyr Tydfil since 2007.
Most recently, 11, Brecon Road, Merthyr Tydfil, CF47 8LS, a freehold house, sold at £110,000 on the 2nd February 2026.
Read more about house prices in CF47.
- Sold Feb 2026£110,000 | 3 Bed House11, Brecon Road, Merthyr Tydfil, CF47 8LS11, Brecon Road, Merthyr Tydfil, CF47 8LS
- Sold Nov 2025£78,000 | 2 Bed House22, Castle Square, Merthyr Tydfil, CF47 8NU22, Castle Square, Merthyr Tydfil, CF47 8NU
- Sold Aug 2025£80,000 | 3 Bed House2, Vincent Place, Merthyr Tydfil, CF47 8PT2, Vincent Place, Merthyr Tydfil, CF47 8PT
- Sold Dec 2024£67,500 | 2 Bed House6, Tydfil Terrace, Merthyr Tydfil, CF47 8SY6, Tydfil Terrace, Merthyr Tydfil, CF47 8SY
- Sold Nov 2024£122,500 | 3 Bed House5, Vincent Place, Merthyr Tydfil, CF47 8PT5, Vincent Place, Merthyr Tydfil, CF47 8PT
Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Explore Nearby Properties
The surrounding properties have an average estimated value of £109,460, ranging from £92,792 to £178,183.
- 19 Castle Square
2 Bed House | 3 m | Est. Value: £108,429
- 57 The Grawen
3 Bed House | 5 m | Est. Value: £178,183
- 21 Castle Square
2 Bed House | 6 m | Est. Value: £105,569
- 22 Castle Square
2 Bed House | 11 m | Est. Value: £107,484
- 6 Emlyn Terrace
3 Bed House | 13 m | Est. Value: £93,096
Location Comparison
Our analysis of the public data ranks 20, Castle Square, Merthyr Tydfil as the 14th largest and the 14th most expensive of the 26 addresses on Castle Square, Merthyr Tydfil, CF47.
Against the CF47 postcode district average, it is £47k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Merthyr Tydfil|1.1 km away
- Pentre-Bach|3.5 km away
- Troed-y-rhiw|5.3 km away
Available Internet Speeds
Ofcom's latest figures show superfast broadband available in this area.
According to recent data from Ofcom, Superfast Broadband available in this area.
Risk of Flooding
Environment Agency data suggests this area has a Very Low risk of flooding.
