According to data from HM Land Registry, 18, Heol Seion, Llanelli sits on a plot of 296 m².

We have plot size data on 19 out of 23 other houses in the postcode and 18, Heol Seion, Llanelli sits on the 9th largest plot.

18, Heol Seion, Llanelli has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 27 Aug 2009.

The property is connected to mains gas and has partial double glazing. It is heated using a boiler and radiators (mains gas).

According to HM Land Registry, 18, Heol Seion, Llanelli was last sold on 31st March 2010 for £88,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since March 2010, the market for similar properties has risen by 55.0%.

According to the Land Registry and our network of Estate Agents, there have been 46 sales of properties similar to 18, Heol Seion, Llanelli within a radius of 1.4 kilometres since 2009.

The most recent example is 14, Clos Plas Isaf, Llanelli, SA14 8RX, a freehold house which sold for £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 Mar 2024£130,000 | 2 Bed House50, Parc Morlais, Llanelli, SA14 8XZ50, Parc Morlais, Llanelli, SA14 8XZ
• 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 May 2016£109,000 | 3 Bed House39, Cleviston Park, Llanelli, SA14 9UW39, Cleviston Park, Llanelli, SA14 9UW
• Sold Nov 2015£77,000 | 2 Bed House20, Heol Seion, Llanelli, SA14 8TZ20, Heol Seion, Llanelli, SA14 8TZ
• Sold Jul 2010£105,000 | 2 Bed House16, Heol Plas Isaf, Llanelli, SA14 8TJ16, Heol Plas Isaf, Llanelli, SA14 8TJ
• Sold Mar 2009£95,000 | 3 Bed House17, Heol Plas Isaf, Llanelli, SA14 8TJ17, Heol Plas Isaf, Llanelli, SA14 8TJ

Heol Seion, Llangennech, Llanelli, SA14 has a total of 23 addresses. According to our analysis of all the public data, 18, Heol Seion, Llanelli is the 23rd largest and the 23rd most expensive property on the street.

When compared to the postcode district it is £34k less expensive than the average property in SA14.

• Llangennech

  |

  500 m away
• Bynea

  |

  2.3 km away
• Pontarddulais

  |

  4.0 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.