30, Upper William Street, Llanelli occupies a 117 m² plot as recorded by HM Land Registry.

Of the 17 other houses in this postcode, 14 have recorded plot sizes, and this one ranks as the 10th largest.

30, Upper William Street, Llanelli has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 19 Aug 2015.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

30, Upper William Street, Llanelli last changed hands on 30th November 2018, selling for £92,500. 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 105.9% since November 2018.

• Sold Nov 2018£92,500
• Sold Oct 2008£117,500

Land Registry records and our Estate Agent network show 235 sales of comparable properties within 460 metres of 30, Upper William Street, Llanelli since 2022.

Most recently, 55, Marble Hall Road, Llanelli, SA15 1NW, a freehold house, sold at £143,000 on the 7th April 2026.

Read more about house prices in SA15.

• Sold Apr 2026£143,000 | 3 Bed House55, Marble Hall Road, Llanelli, SA15 1NW55, Marble Hall Road, Llanelli, SA15 1NW
• Sold Mar 2026£1,100,000 | 3 Bed House16, Als Street, Llanelli, SA15 1SN16, Als Street, Llanelli, SA15 1SN
• Sold Mar 2026£108,000 | 3 Bed House33, Wern Road, Llanelli, SA15 1SP33, Wern Road, Llanelli, SA15 1SP
• Sold Mar 2026£142,000 | 3 Bed House20, Pottery Street, Llanelli, SA15 1TA20, Pottery Street, Llanelli, SA15 1TA
• Sold Feb 2026£145,000 | 3 Bed House69, Pottery Street, Llanelli, SA15 1TA69, Pottery Street, Llanelli, SA15 1TA
• Sold Dec 2025£155,000 | 3 Bed House9, Tunnel Road, Llanelli, SA15 1LE9, Tunnel Road, Llanelli, SA15 1LE
• Sold Oct 2025£105,000 | 3 Bed House32, Marble Hall Road, Llanelli, SA15 1NN32, Marble Hall Road, Llanelli, SA15 1NN
• Sold Oct 2025£150,000 | 3 Bed House48, Upper Robinson Street, Llanelli, SA15 1TR48, Upper Robinson Street, Llanelli, SA15 1TR
• Sold Sep 2025£137,000 | 3 Bed House22, Elizabeth Street, Llanelli, SA15 1TP22, Elizabeth Street, Llanelli, SA15 1TP
• Sold Aug 2025£96,000 | 3 Bed House7, Als Street, Llanelli, SA15 1SN7, Als Street, Llanelli, SA15 1SN
• Sold Jul 2025£138,000 | 3 Bed House25, James Street, Llanelli, SA15 1DU25, James Street, Llanelli, SA15 1DU
• Sold Jan 2025£110,000 | 3 Bed House2, Marble Hall Road, Llanelli, SA15 1NN2, Marble Hall Road, Llanelli, SA15 1NN
• Sold Dec 2024£132,500 | 3 Bed House6, Elizabeth Street, Llanelli, SA15 1TP6, Elizabeth Street, Llanelli, SA15 1TP
• Sold Aug 2024£78,000 | 3 Bed House57, Wern Road, Llanelli, SA15 1SP57, Wern Road, Llanelli, SA15 1SP
• Sold Jul 2024£130,000 | 3 Bed House31, Andrew Street, Llanelli, SA15 3YW31, Andrew Street, Llanelli, SA15 3YW
• Sold Jun 2024£80,000 | 3 Bed House63, Pottery Street, Llanelli, SA15 1TA63, Pottery Street, Llanelli, SA15 1TA
• Sold Apr 2024£95,000 | 3 Bed House15, Wern Road, Llanelli, SA15 1SP15, Wern Road, Llanelli, SA15 1SP
• Sold Aug 2022£96,000 | 3 Bed House1A, Marble Hall Road, Llanelli, SA15 1NN1A, Marble Hall Road, Llanelli, SA15 1NN
• Sold Jun 2022£115,000 | 3 Bed House28, James Street, Llanelli, SA15 1DU28, James Street, Llanelli, SA15 1DU
• Sold May 2022£122,000 | 3 Bed House18, James Street, Llanelli, SA15 1DU18, James Street, Llanelli, SA15 1DU

Our analysis of the public data ranks 30, Upper William Street, Llanelli as the 7th largest and the 5th most expensive of the 17 addresses on Upper William Street, Llanelli, SA15.

Against the SA15 postcode district average, it is £56k less expensive than the typical property.

• Llanelli

  |

  1.0 km away
• Bynea

  |

  4.1 km away
• Llangennech

  |

  5.4 km away

Environment Agency data suggests this area has a Very Low risk of flooding.