Our Data Sources
20, Upper William Street, Llanelli has 2 entries in the Land Registry, most recently in December 2014 and a single entry in the EPC database dated June 2017.
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.
Price Range & Condition
Decorative condition can have a big effect on a property's value and this effect varies depending on the type, size and location of the property.
If 20, Upper William Street, Llanelli is in very good condition we estimate a sale value of £115,067 and a rental value of £785 per month.
However, if the property needs a lot of cosmetic work we estimate a sale value of £101,917 and a rental value of £695 per month.
Plot Size
According to data from HM Land Registry, 20, Upper William Street, Llanelli sits on a plot of 148 m2.
We have plot size data on 14 out of 17 other houses in the postcode and 20, Upper William Street, Llanelli sits on the 4th largest plot.
Energy Efficiency
20, Upper William Street, Llanelli has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 02 Jun 2017.
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
According to HM Land Registry, 20, Upper William Street, Llanelli was last sold on 18th December 2014 for £77,000 and was recorded as a freehold house.
The property has had 2 sales since 1995.
Since December 2014, the market for similar properties has risen by 124.0%.
- Sold Dec 2014£77,000
- Sold Mar 2013£49,000
Similar Properties Sold Nearby
According to the Land Registry and our network of Estate Agents, there have been 80 sales of properties similar to 20, Upper William Street, Llanelli within a radius of 460 metres since 2018.
The most recent example is 4, Wern Road, Llanelli, SA15 1SR, a freehold house which sold for £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 Feb 2026£69,500 | 3 Bed House6, Cae Du Bach, Llanelli, SA15 3AQ6, Cae Du Bach, Llanelli, SA15 3AQ
- Sold Jan 2026£96,600 | 3 Bed House5, Pottery Place, Llanelli, SA15 1ST5, Pottery Place, Llanelli, SA15 1ST
- Sold Dec 2025£114,000 | 3 Bed House24, Swansea Road, Llanelli, SA15 3YT24, Swansea Road, Llanelli, SA15 3YT
- Sold Dec 2024£87,000 | 3 Bed House21, Swansea Road, Llanelli, SA15 3YT21, Swansea Road, Llanelli, SA15 3YT
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 £129,282, ranging from £67,216 to £192,290.
- 21 Upper William Street
3 Bed House | 5 m | Est. Value: £115,279
- 18 Upper William Street
3 Bed House | 9 m | Est. Value: £132,600
- 23 Upper William Street
3 Bed House | 14 m | Est. Value: £105,337
- 17 Upper William Street
3 Bed House | 14 m | Est. Value: £110,419
- 24 Upper William Street
3 Bed House | 18 m | Est. Value: £109,588
Location Comparison
Upper William Street, Llanelli, SA15 has a total of 17 addresses. According to our analysis of all the public data, 20, Upper William Street, Llanelli is the 16th largest and the 16th most expensive property on the street.
When compared to the postcode district it is £81k less expensive than the average property in SA15.
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
According to recent data from Ofcom, Superfast Broadband is available in this area.
According to recent data from Ofcom, Superfast Broadband available in this area.
Risk of Flooding
According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.
