Our Data Sources
21, Castle Road, Builth Wells has no recent1 records in the Land Registry and a single entry in the EPC database dated October 2015.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 out of 5 and is considered of medium accuracy.
1Sales dated prior to 2007 are shown, but are not used in our calculations.
Price Range & Condition
In very good condition, we estimate 21, Castle Road, Builth Wells would be worth £302,828, with a potential rental value of £1,019 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £268,219, with a rental value of £902 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Plot Size
21, Castle Road, Builth Wells occupies a 412 m2 plot as recorded by HM Land Registry.
Of the 36 other houses in this postcode, 27 have recorded plot sizes, and this one ranks as the 3rd largest.
Energy Efficiency
21, Castle Road, Builth Wells has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 24 Oct 2015.
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
21, Castle Road, Builth Wells last changed hands on 20th March 2002, selling for £40,000. The transaction was logged as a freehold house by HM Land Registry.
That is its only recorded sale since 1995.
- Sold Mar 2002£40,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 64 sales of comparable properties within 4.6 kilometres of 21, Castle Road, Builth Wells since 2014.
Most recently, The Firs, Hay Road, Builth Wells, LD2 3BP, a freehold house, sold at £210,000 on the 31st October 2025.
Read more about house prices in LD2.
- Sold Oct 2025£210,000 | 4 Bed HouseThe Firs, Hay Road, Builth Wells, LD2 3BPThe Firs, Hay Road, Builth Wells, LD2 3BP
- Sold May 2025£350,000 | 4 Bed House16, Troed Y Bryn, Builth Wells, LD2 3FE16, Troed Y Bryn, Builth Wells, LD2 3FE
- Sold Jan 2025£355,000 | 4 Bed HousePines, Hay Road, Builth Wells, LD2 3BPPines, Hay Road, Builth Wells, LD2 3BP
- Sold Oct 2024£315,000 | 4 Bed House31, Newry Road, Builth Wells, LD2 3EH31, Newry Road, Builth Wells, LD2 3EH
- Sold Sep 2024£300,000 | 4 Bed House18, Troed Y Bryn, Builth Wells, LD2 3FE18, Troed Y Bryn, Builth Wells, LD2 3FE
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 £216,288, ranging from £172,603 to £251,629.
- 23 Castle Road
3 Bed House | 9 m | Est. Value: £251,629
- 25 Castle Road
3 Bed House | 18 m | Est. Value: £211,262
- 8 Castle Road
3 Bed House | 21 m | Est. Value: £235,703
- 27 Castle Road
3 Bed House | 27 m | Est. Value: £217,732
- 12 Castle Road
3 Bed House | 28 m | Est. Value: £184,108
Location Comparison
Our analysis of the public data ranks 21, Castle Road, Builth Wells as the 4th largest and the 4th most expensive of the 49 addresses on Castle Road, Builth Wells, LD2.
Against the LD2 postcode district average, it is £12k more expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Builth Road|3.0 km away
- Cilmeri|3.9 km away
- Garth (Powys)|9.0 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.












