21, Lon Helen, Caernarfon has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 08 Nov 2024.

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

Since 2007 86 properties similar to 21, Lon Helen, Caernarfon have sold within a radius of 600 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 20th February 2026, was 47, Assheton Terrace, Caernarfon, LL55 2LD, a freehold house which sold for £146,250.

Read more about house prices in LL55.

• Sold Feb 2026£146,250 | 3 Bed House47, Assheton Terrace, Caernarfon, LL55 2LD47, Assheton Terrace, Caernarfon, LL55 2LD
• 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 Nov 2024£157,000 | 3 Bed House6, Margaret Street, Caernarfon, LL55 1NB6, Margaret Street, Caernarfon, LL55 1NB
• Sold Oct 2024£136,500 | 3 Bed House6, St. Helens Street, Caernarfon, LL55 2HU6, St. Helens Street, Caernarfon, LL55 2HU
• Sold Aug 2024£147,000 | 3 Bed House38, Margaret Street, Caernarfon, LL55 1NB38, Margaret Street, Caernarfon, LL55 1NB
• Sold Jun 2024£90,000 | 3 Bed House9, Assheton Terrace, Caernarfon, LL55 2LD9, Assheton Terrace, Caernarfon, LL55 2LD
• 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 Sep 2023£106,000 | 3 Bed House8, Margaret Street, Caernarfon, LL55 1NB8, Margaret Street, Caernarfon, LL55 1NB
• Sold Jun 2023£120,000 | 3 Bed House4, Beulah Square, Caernarfon, LL55 2LA4, Beulah Square, Caernarfon, LL55 2LA
• Sold Mar 2023£125,000 | 3 Bed House9, Margaret Street, Caernarfon, LL55 1NB9, Margaret Street, Caernarfon, LL55 1NB
• Sold Mar 2023£151,000 | 3 Bed House10, Lon Ty Gwyn, Caernarfon, LL55 2EH10, Lon Ty Gwyn, Caernarfon, LL55 2EH
• Sold Apr 2022£148,000 | 3 Bed House17, Margaret Street, Caernarfon, LL55 1NB17, Margaret Street, Caernarfon, LL55 1NB
• Sold Mar 2021£122,000 | 3 Bed House23, Margaret Street, Caernarfon, LL55 1NB23, Margaret Street, Caernarfon, LL55 1NB
• 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 Aug 2007£118,000 | 4 Bed House17, Lon Helen, Caernarfon, LL55 2EW17, Lon Helen, Caernarfon, LL55 2EW

Of the 22 addresses on Lon Helen, Caernarfon, LL55, 21, Lon Helen, Caernarfon comes out as the 10th largest and the 10th most expensive in our analysis of the public data.

It is also £72k less expensive than the average property across the LL55 district.

• Llanfairpwll

  |

  9.9 km away
• Bangor (Gwynedd)

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  12.6 km away
• Bodorgan

  |

  12.8 km away

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