HM Land Registry records the plot of land for 30, William Street, Caernarfon as measuring 77 m².

That makes it the 11th largest plot in the postcode, where 38 of the 39 other houses have recorded plot data.

30, William Street, Caernarfon has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 06 Feb 2025.

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 30, William Street, Caernarfon completed on 17th October 2012 at £82,500 and was recorded by HM Land Registry as a freehold house.

Since 1995 this is the property's only sale.

Values of comparable properties have risen by 95.9% over the period since October 2012.

• Sold Oct 2012£82,500

Since 2011 60 properties similar to 30, 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 5th September 2025, was 4, Cadnant Road, Caernarfon, LL55 1NA, a freehold house which sold for £120,000.

Read more about house prices in LL55.

• Sold Sep 2025£120,000 | 3 Bed House4, Cadnant Road, Caernarfon, LL55 1NA4, Cadnant Road, Caernarfon, LL55 1NA
• Sold Aug 2025£92,500 | 3 Bed House18, New Street, Caernarfon, LL55 2PU18, New Street, Caernarfon, LL55 2PU
• Sold May 2025£105,000 | 2 Bed House34, New Street, Caernarfon, LL55 2PU34, New Street, Caernarfon, LL55 2PU
• Sold May 2025£110,000 | 2 Bed House33, New Street, Caernarfon, LL55 2PU33, New Street, Caernarfon, LL55 2PU
• Sold Feb 2025£115,000 | 2 Bed House24, South Penrallt, Caernarfon, LL55 1NS24, South Penrallt, Caernarfon, LL55 1NS
• Sold Jan 2025£90,000 | 3 Bed House34, William Street, Caernarfon, LL55 1ND34, William Street, Caernarfon, LL55 1ND
• Sold Jul 2024£111,000 | 3 Bed House37, William Street, Caernarfon, LL55 1ND37, William Street, Caernarfon, LL55 1ND
• Sold Mar 2024£115,000 | 2 Bed House42, Chapel Street, Caernarfon, LL55 2PS42, Chapel Street, Caernarfon, LL55 2PS
• Sold Sep 2023£118,000 | 2 Bed House4, William Street, Caernarfon, LL55 1ND4, William Street, Caernarfon, LL55 1ND
• Sold Feb 2023£137,500 | 2 Bed House37, South Penrallt, Caernarfon, LL55 1NS37, South Penrallt, Caernarfon, LL55 1NS
• Sold Oct 2022£110,000 | 3 Bed House39, William Street, Caernarfon, LL55 1ND39, William Street, Caernarfon, LL55 1ND
• Sold Aug 2022£70,000 | 2 Bed House4, Pool Street, Caernarfon, LL55 2AB4, Pool Street, Caernarfon, LL55 2AB
• Sold Jun 2022£134,000 | 2 Bed House40, William Street, Caernarfon, LL55 1ND40, William Street, Caernarfon, LL55 1ND
• Sold Aug 2021£102,000 | 2 Bed House29, William Street, Caernarfon, LL55 1ND29, William Street, Caernarfon, LL55 1ND
• Sold Dec 2020£90,000 | 2 Bed House21, William Street, Caernarfon, LL55 1ND21, William Street, Caernarfon, LL55 1ND
• Sold Jul 2019£95,000 | 3 Bed House32, William Street, Caernarfon, LL55 1ND32, William Street, Caernarfon, LL55 1ND
• Sold Apr 2019£70,000 | 2 Bed House13, New Street, Caernarfon, LL55 2PU13, New Street, Caernarfon, LL55 2PU
• Sold May 2016£111,000 | 2 Bed House2, William Street, Caernarfon, LL55 1ND2, William Street, Caernarfon, LL55 1ND
• Sold Mar 2015£98,500 | 3 Bed House15, William Street, Caernarfon, LL55 1ND15, William Street, Caernarfon, LL55 1ND
• Sold Dec 2011£98,000 | 2 Bed House22, William Street, Caernarfon, LL55 1ND22, William Street, Caernarfon, LL55 1ND

Of the 39 addresses on William Street, Caernarfon, LL55, 30, William Street, Caernarfon comes out as the 27th largest and the 28th most expensive in our analysis of the public data.

It is also £117k 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.