20, Heol Seion, Llanelli occupies a 273 m² plot as recorded by HM Land Registry.

Of the 23 other houses in this postcode, 19 have recorded plot sizes, and this one ranks as the 12th largest.

20, Heol Seion, Llanelli has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 17 Apr 2018.

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

20, Heol Seion, Llanelli last changed hands on 20th November 2015, selling for £77,000. 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 54.8% since November 2015.

Land Registry records and our Estate Agent network show 57 sales of comparable properties within 1.4 kilometres of 20, Heol Seion, Llanelli since 2010.

Most recently, 14, Clos Plas Isaf, Llanelli, SA14 8RX, a freehold house, sold at £110,000 on the 29th May 2026.

Read more about house prices in SA14.

• Sold May 2026£110,000 | 2 Bed House14, Clos Plas Isaf, Llanelli, SA14 8RX14, Clos Plas Isaf, Llanelli, SA14 8RX
• Sold Apr 2026£146,000 | 3 Bed House5, Clos Plas Isaf, Llanelli, SA14 8RX5, Clos Plas Isaf, Llanelli, SA14 8RX
• Sold Feb 2026£157,500 | 2 Bed House65, Hendre Park, Llanelli, SA14 8UR65, Hendre Park, Llanelli, SA14 8UR
• Sold May 2024£189,950 | 3 Bed House49, Cleviston Park, Llanelli, SA14 9UP49, Cleviston Park, Llanelli, SA14 9UP
• Sold Dec 2023£153,000 | 2 Bed House9, Clos Cae Fainc, Llanelli, SA14 8TQ9, Clos Cae Fainc, Llanelli, SA14 8TQ
• Sold Sep 2023£165,000 | 2 Bed House59, Hendre Park, Llanelli, SA14 8UR59, Hendre Park, Llanelli, SA14 8UR
• Sold Aug 2023£140,000 | 2 Bed House8, Clos Cae Fainc, Llanelli, SA14 8TQ8, Clos Cae Fainc, Llanelli, SA14 8TQ
• Sold Jan 2023£145,000 | 3 Bed House24, Heol Seion, Llanelli, SA14 8TZ24, Heol Seion, Llanelli, SA14 8TZ
• Sold May 2022£143,000 | 2 Bed House10, Heol Plas Isaf, Llanelli, SA14 8TJ10, Heol Plas Isaf, Llanelli, SA14 8TJ
• Sold Dec 2021£155,000 | 2 Bed House13, Heol Plas Isaf, Llanelli, SA14 8TJ13, Heol Plas Isaf, Llanelli, SA14 8TJ
• Sold Feb 2021£125,000 | 2 Bed House57, Hendre Park, Llanelli, SA14 8UR57, Hendre Park, Llanelli, SA14 8UR
• Sold Jun 2019£133,000 | 3 Bed House60, Hendre Road, Llanelli, SA14 8TX60, Hendre Road, Llanelli, SA14 8TX
• Sold May 2018£123,950 | 3 Bed House14, Heol Seion, Llanelli, SA14 8TZ14, Heol Seion, Llanelli, SA14 8TZ
• Sold Mar 2018£87,500 | 2 Bed House103, Brynhyfryd, Llanelli, SA14 8GE103, Brynhyfryd, Llanelli, SA14 8GE
• Sold Dec 2016£85,000 | 2 Bed House3, Clos Cae Fainc, Llanelli, SA14 8TQ3, Clos Cae Fainc, Llanelli, SA14 8TQ
• Sold Feb 2016£93,000 | 3 Bed House15, Heol Plas Isaf, Llanelli, SA14 8TJ15, Heol Plas Isaf, Llanelli, SA14 8TJ
• Sold Oct 2014£124,000 | 3 Bed House19, Heol Seion, Llanelli, SA14 8TZ19, Heol Seion, Llanelli, SA14 8TZ
• Sold May 2014£85,000 | 3 Bed House12, Heol Seion, Llanelli, SA14 8TZ12, Heol Seion, Llanelli, SA14 8TZ
• Sold Nov 2010£116,000 | 3 Bed House6, Heol Plas Isaf, Llanelli, SA14 8TJ6, Heol Plas Isaf, Llanelli, SA14 8TJ
• Sold Jul 2010£105,000 | 2 Bed House16, Heol Plas Isaf, Llanelli, SA14 8TJ16, Heol Plas Isaf, Llanelli, SA14 8TJ

Our analysis of the public data ranks 20, Heol Seion, Llanelli as the 20th largest and the 20th most expensive of the 23 addresses on Heol Seion, Llangennech, Llanelli, SA14.

Against the SA14 postcode district average, it is £29k less expensive than the typical property.

• Llangennech

  |

  500 m away
• Bynea

  |

  2.3 km away
• Pontarddulais

  |

  4.0 km away

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