HM Land Registry records the plot of land for 43, William Street, Caernarfon as measuring 62 m².

That makes it the 29th largest plot in the postcode, where 38 of the 39 other houses have recorded plot data.

43, William Street, Caernarfon has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 20 Mar 2017.

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

Since 2009 75 properties similar to 43, William Street, Caernarfon have sold within a radius of 500 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 22nd December 2025, was 3, New Street, Caernarfon, LL55 2PU, a freehold house which sold for £120,000.

Read more about house prices in LL55.

• Sold Dec 2025£120,000 | 3 Bed House3, New Street, Caernarfon, LL55 2PU3, New Street, Caernarfon, LL55 2PU
• Sold Dec 2025£147,500 | 3 Bed House34, Margaret Street, Caernarfon, LL55 1NB34, Margaret Street, Caernarfon, LL55 1NB
• Sold Nov 2025£110,000 | 3 Bed House54, Chapel Street, Caernarfon, LL55 2PS54, Chapel Street, Caernarfon, LL55 2PS
• Sold Mar 2025£95,000 | 3 Bed House3, Cadnant Road, Caernarfon, LL55 1NA3, Cadnant Road, Caernarfon, LL55 1NA
• Sold Nov 2024£150,000 | 3 Bed House12, Holywell Terrace, Caernarfon, LL55 2AP12, Holywell Terrace, Caernarfon, LL55 2AP
• Sold Oct 2024£90,000 | 3 Bed House28, William Street, Caernarfon, LL55 1ND28, William Street, Caernarfon, LL55 1ND
• Sold Oct 2024£88,000 | 3 Bed House50, Chapel Street, Caernarfon, LL55 2PS50, Chapel Street, Caernarfon, LL55 2PS
• Sold Jul 2024£111,000 | 3 Bed House37, William Street, Caernarfon, LL55 1ND37, William Street, Caernarfon, LL55 1ND
• Sold Jun 2024£90,000 | 3 Bed House9, Assheton Terrace, Caernarfon, LL55 2LD9, Assheton Terrace, Caernarfon, LL55 2LD
• Sold Dec 2023£60,000 | 3 Bed House58, Chapel Street, Caernarfon, LL55 2PS58, Chapel Street, Caernarfon, LL55 2PS
• Sold Aug 2023£131,750 | 3 Bed House40, Chapel Street, Caernarfon, LL55 2PS40, Chapel Street, Caernarfon, LL55 2PS
• Sold Aug 2022£125,000 | 3 Bed House15, New Street, Caernarfon, LL55 2PU15, New Street, Caernarfon, LL55 2PU
• Sold Aug 2022£105,000 | 3 Bed House52, Chapel Street, Caernarfon, LL55 2PS52, Chapel Street, Caernarfon, LL55 2PS
• Sold Jun 2022£135,000 | 3 Bed House23, New Street, Caernarfon, LL55 2PU23, New Street, Caernarfon, LL55 2PU
• Sold May 2022£107,500 | 3 Bed House20, William Street, Caernarfon, LL55 1ND20, William Street, Caernarfon, LL55 1ND
• Sold Jan 2021£110,000 | 3 Bed House11, William Street, Caernarfon, LL55 1ND11, William Street, Caernarfon, LL55 1ND
• Sold Jun 2020£95,000 | 3 Bed House14, William Street, Caernarfon, LL55 1ND14, William Street, Caernarfon, LL55 1ND
• Sold Nov 2014£90,000 | 3 Bed House18, William Street, Caernarfon, LL55 1ND18, William Street, Caernarfon, LL55 1ND
• Sold Dec 2013£85,000 | 3 Bed House38, William Street, Caernarfon, LL55 1ND38, William Street, Caernarfon, LL55 1ND
• Sold Dec 2009£86,500 | 3 Bed House10, William Street, Caernarfon, LL55 1ND10, William Street, Caernarfon, LL55 1ND

Of the 39 addresses on William Street, Caernarfon, LL55, 43, William Street, Caernarfon comes out as the 4th largest and the 6th most expensive in our analysis of the public data.

It is also £99k less expensive than the average property across the LL55 district.

• Llanfairpwll

  |

  9.8 km away
• Bodorgan

  |

  12.2 km away
• Bangor (Gwynedd)

  |

  12.7 km away

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