7, Lon Helen, Caernarfon has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 17 Dec 2015.

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

The most recent sale of 7, Lon Helen, Caernarfon completed on 1st September 2008 at £57,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 27.1% over the period since September 2008.

• Sold Sep 2008£57,000

Since 2007 579 properties have sold within 560 metres of 7, Lon Helen, Caernarfon, per the Land Registry and our network of Estate Agents.

The latest, on the 27th November 2025, was 21, Lon Eilian, Caernarfon, LL55 2EG, a freehold house which sold for £140,000.

Read more about house prices in LL55.

• Sold Nov 2025£140,000 | 3 Bed House21, Lon Eilian, Caernarfon, LL55 2EG21, Lon Eilian, Caernarfon, LL55 2EG
• Sold Jun 2024£156,350 | 3 Bed House57, Lon Eilian, Caernarfon, LL55 2EG57, Lon Eilian, Caernarfon, LL55 2EG
• Sold Jun 2023£177,500 | 3 Bed House19, Lon Ty Gwyn, Caernarfon, LL55 2EH19, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Mar 2023£151,000 | 3 Bed House10, Lon Ty Gwyn, Caernarfon, LL55 2EH10, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Dec 2020£155,000 | 4 Bed House2, Ty Gwyn, Caernarfon, LL55 2EL2, Ty Gwyn, Caernarfon, LL55 2EL
• Sold Nov 2019£143,500 | 3 Bed House18, Lon Arfon, Caernarfon, LL55 2ER18, Lon Arfon, Caernarfon, LL55 2ER
• Sold Mar 2019£138,000 | 3 Bed House17, Lon Arfon, Caernarfon, LL55 2ER17, Lon Arfon, Caernarfon, LL55 2ER
• Sold Dec 2018£125,000 | 3 Bed House11, Lon Arfon, Caernarfon, LL55 2ER11, Lon Arfon, Caernarfon, LL55 2ER
• Sold Feb 2015£88,000 | 3 Bed House49, Lon Eilian, Caernarfon, LL55 2EG49, Lon Eilian, Caernarfon, LL55 2EG
• Sold Jan 2015£80,000 | 3 Bed House7, Cil Coed, Caernarfon, LL55 2DP7, Cil Coed, Caernarfon, LL55 2DP
• Sold Aug 2014£104,000 | 3 Bed House8, Lon Ty Gwyn, Caernarfon, LL55 2EH8, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Apr 2012£115,000 | 3 Bed House10, Lon Arfon, Caernarfon, LL55 2ER10, Lon Arfon, Caernarfon, LL55 2ER
• Sold Mar 2012£96,000 | 3 Bed House6, Lon Helen, Caernarfon, LL55 2EW6, Lon Helen, Caernarfon, LL55 2EW
• Sold Nov 2011£108,000 | 3 Bed House2, Lon Ty Gwyn, Caernarfon, LL55 2EH2, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Nov 2011£93,000 | 3 Bed House53, Lon Eilian, Caernarfon, LL55 2EG53, Lon Eilian, Caernarfon, LL55 2EG
• Sold Oct 2010£89,950 | 3 Bed House16, Lon Cefn Du, Caernarfon, LL55 2EN16, Lon Cefn Du, Caernarfon, LL55 2EN
• Sold Jul 2010£120,000 | 3 Bed House41, Lon Eilian, Caernarfon, LL55 2EG41, Lon Eilian, Caernarfon, LL55 2EG
• Sold Apr 2009£85,000 | 3 Bed House25, Hyfrydle, Caernarfon, LL55 2EU25, Hyfrydle, Caernarfon, LL55 2EU
• Sold Aug 2007£118,000 | 4 Bed House17, Lon Helen, Caernarfon, LL55 2EW17, Lon Helen, Caernarfon, LL55 2EW
• Sold Mar 2007£60,000 | 2 Bed House6, Lon Ty Gwyn, Caernarfon, LL55 2EH6, Lon Ty Gwyn, Caernarfon, LL55 2EH

Of the 22 addresses on Lon Helen, Caernarfon, LL55, 7, Lon Helen, Caernarfon comes out as the 17th largest and the 17th most expensive in our analysis of the public data.

It is also £152k less expensive than the average property across the LL55 district.

• Llanfairpwll

  |

  9.9 km away
• Bangor (Gwynedd)

  |

  12.6 km away
• Bodorgan

  |

  12.8 km away

The flood risk here is rated Very Low, based on Environment Agency data.