Our Data Sources
23, Upper William Street, Llanelli has 21 entries in the Land Registry, most recently in November 2020 and a single entry in the EPC database dated December 2025.
We combine this information with that 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 23, Upper William Street, Llanelli would be worth £110,604, with a potential rental value of £764 per month.
If substantial cosmetic improvements are needed, the estimated sale value falls to £97,963, with a rental value of £677 per month.
The extent to which decoration affects a property's value depends on its type, size and location.
Energy Efficiency
23, Upper William Street, Llanelli has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 23 Dec 2025.
The property is connected to mains gas and has high performance glazing. It is heated using a boiler and radiators (mains gas).
Sold Prices
23, Upper William Street, Llanelli last changed hands on 6th November 2020, selling for £92,000. The transaction was logged as a freehold house by HM Land Registry.
In total it has sold twice since 1995.
The market for similar properties has risen by 77.5% since November 2020.
- Sold Nov 2020£92,000
- Sold Nov 2005£40,000
Similar Properties Sold Nearby
Land Registry records and our Estate Agent network show 49 sales of comparable properties within 460 metres of 23, Upper William Street, Llanelli since 2014.
Most recently, 4, Wern Road, Llanelli, SA15 1SR, a freehold house, sold at £130,000 on the 29th April 2026.
Read more about house prices in SA15.
- Sold Apr 2026£130,000 | 3 Bed House4, Wern Road, Llanelli, SA15 1SR4, Wern Road, Llanelli, SA15 1SR
- Sold Dec 2025£114,000 | 3 Bed House24, Swansea Road, Llanelli, SA15 3YT24, Swansea Road, Llanelli, SA15 3YT
- Sold Dec 2024£107,000 | 3 Bed House16, Wern Road, Llanelli, SA15 1SR16, Wern Road, Llanelli, SA15 1SR
- Sold Oct 2024£105,000 | 3 Bed House14, Swansea Road, Llanelli, SA15 3YT14, Swansea Road, Llanelli, SA15 3YT
- Sold Jan 2024£69,995 | 3 Bed House7, Cae Du Bach, Llanelli, SA15 3AQ7, Cae Du Bach, Llanelli, SA15 3AQ
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 £133,190, ranging from £109,588 to £188,090.
- 24 Upper William Street
3 Bed House | 5 m | Est. Value: £109,588
- 21 Upper William Street
3 Bed House | 9 m | Est. Value: £115,279
- 25 Upper William Street
3 Bed House | 9 m | Est. Value: £131,034
- 20 Upper William Street
3 Bed House | 14 m | Est. Value: £109,588
- 29 Upper William Street
4 Bed House | 23 m | Est. Value: £153,668
Location Comparison
Our analysis of the public data ranks 23, Upper William Street, Llanelli as the 17th largest and the 17th most expensive of the 17 addresses on Upper William Street, Llanelli, SA15.
Against the SA15 postcode district average, it is £85k less expensive than the typical property.
More reading links
Schools Nearby
Public Transport Nearby
- Llanelli|1.0 km away
- Bynea|4.1 km away
- Llangennech|5.4 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.
