17, Lon Helen, Caernarfon occupies a 329 m² plot as recorded by HM Land Registry.

Of the 14 other houses in this postcode, 4 have recorded plot sizes, and this one ranks as the largest.

17, Lon Helen, Caernarfon has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 06 Dec 2014.

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

17, Lon Helen, Caernarfon last changed hands on 30th August 2007, selling for £118,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 89.5% since August 2007.

• Sold Aug 2007£118,000

Land Registry records and our Estate Agent network show 96 sales of comparable properties within 580 metres of 17, Lon Helen, Caernarfon since 2010.

Most recently, 12, Segontium Road South, Caernarfon, LL55 2LL, a freehold house, sold at £162,500 on the 20th February 2026.

Read more about house prices in LL55.

• Sold Feb 2026£162,500 | 3 Bed House12, Segontium Road South, Caernarfon, LL55 2LL12, Segontium Road South, Caernarfon, LL55 2LL
• Sold Dec 2025£147,500 | 3 Bed House34, Margaret Street, Caernarfon, LL55 1NB34, Margaret Street, Caernarfon, LL55 1NB
• Sold Nov 2025£140,000 | 3 Bed House21, Lon Eilian, Caernarfon, LL55 2EG21, Lon Eilian, Caernarfon, LL55 2EG
• Sold May 2025£174,000 | 3 Bed House25, Hafod Terrace, Caernarfon, LL55 2AR25, Hafod Terrace, Caernarfon, LL55 2AR
• Sold Nov 2024£157,000 | 3 Bed House6, Margaret Street, Caernarfon, LL55 1NB6, Margaret Street, Caernarfon, LL55 1NB
• Sold Jun 2024£156,350 | 3 Bed House57, Lon Eilian, Caernarfon, LL55 2EG57, Lon Eilian, Caernarfon, LL55 2EG
• Sold Apr 2024£135,000 | 3 Bed House9, Beulah Square, Caernarfon, LL55 2LA9, Beulah Square, Caernarfon, LL55 2LA
• Sold Mar 2024£138,600 | 3 Bed House5, Assheton Terrace, Caernarfon, LL55 2LD5, Assheton Terrace, Caernarfon, LL55 2LD
• Sold Jun 2023£177,500 | 3 Bed House19, Lon Ty Gwyn, Caernarfon, LL55 2EH19, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Jun 2023£120,000 | 3 Bed House4, Beulah Square, Caernarfon, LL55 2LA4, Beulah Square, Caernarfon, LL55 2LA
• Sold Mar 2023£151,000 | 3 Bed House10, Lon Ty Gwyn, Caernarfon, LL55 2EH10, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Sep 2022£135,000 | 3 Bed House23, Hafod Terrace, Caernarfon, LL55 2AR23, Hafod Terrace, Caernarfon, LL55 2AR
• Sold Aug 2022£145,000 | 3 Bed House9, Lon Ty Gwyn, Caernarfon, LL55 2EH9, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Oct 2021£126,000 | 3 Bed House31, Margaret Street, Caernarfon, LL55 1NB31, Margaret Street, Caernarfon, LL55 1NB
• Sold Oct 2021£160,000 | 3 Bed House2, Margaret Street, Caernarfon, LL55 1NB2, Margaret Street, Caernarfon, LL55 1NB
• Sold Mar 2019£138,000 | 3 Bed House17, Lon Arfon, Caernarfon, LL55 2ER17, Lon Arfon, Caernarfon, LL55 2ER
• Sold Feb 2015£88,000 | 3 Bed House49, Lon Eilian, Caernarfon, LL55 2EG49, Lon Eilian, Caernarfon, LL55 2EG
• Sold Nov 2011£93,000 | 3 Bed House53, Lon Eilian, Caernarfon, LL55 2EG53, Lon Eilian, Caernarfon, LL55 2EG
• Sold Jul 2010£120,000 | 3 Bed House41, Lon Eilian, Caernarfon, LL55 2EG41, Lon Eilian, Caernarfon, LL55 2EG
• Sold May 2010£105,000 | 3 Bed House7, Lon Eilian, Caernarfon, LL55 2EG7, Lon Eilian, Caernarfon, LL55 2EG

Our analysis of the public data ranks 17, Lon Helen, Caernarfon as the 6th largest and the 5th most expensive of the 22 addresses on Lon Helen, Caernarfon, LL55.

Against the LL55 postcode district average, it is £67k less expensive than the typical property.

• Llanfairpwll

  |

  9.9 km away
• Bangor (Gwynedd)

  |

  12.6 km away
• Bodorgan

  |

  12.8 km away

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