HM Land Registry records the plot of land for 45, William Street, Caernarfon as measuring 69 m².

That makes it the 21st largest plot in the postcode, where 38 of the 39 other houses have recorded plot data.

45, William Street, Caernarfon has an Energy Performance Rating (EPC) of G. This is based on the most recent assessment, dated 27 Mar 2017.

The property is connected to mains gas and has fully double glazed windows. It is heated using room heaters (electric).

Since 2013 69 properties similar to 45, 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 Nov 2025£110,000 | 3 Bed House54, Chapel Street, Caernarfon, LL55 2PS54, Chapel Street, Caernarfon, LL55 2PS
• Sold May 2025£149,000 | 3 Bed House12, Constantine Terrace, Caernarfon, LL55 2HL12, Constantine Terrace, Caernarfon, LL55 2HL
• Sold Mar 2025£125,000 | 3 Bed House6, Constantine Terrace, Caernarfon, LL55 2HL6, Constantine Terrace, Caernarfon, LL55 2HL
• Sold Nov 2024£125,000 | 3 Bed House20, South Penrallt, Caernarfon, LL55 1NS20, South Penrallt, Caernarfon, LL55 1NS
• Sold Oct 2024£88,000 | 3 Bed House50, Chapel Street, Caernarfon, LL55 2PS50, Chapel Street, Caernarfon, LL55 2PS
• Sold Sep 2024£125,000 | 3 Bed House12, Pool Lane, Caernarfon, LL55 2AL12, Pool Lane, Caernarfon, LL55 2AL
• Sold Dec 2023£60,000 | 3 Bed House58, Chapel Street, Caernarfon, LL55 2PS58, Chapel Street, Caernarfon, LL55 2PS
• Sold Jun 2023£105,000 | 3 Bed House17, New Street, Caernarfon, LL55 2PU17, New Street, Caernarfon, LL55 2PU
• Sold Nov 2022£154,000 | 3 Bed House3, Constantine Terrace, Caernarfon, LL55 2HL3, Constantine Terrace, Caernarfon, LL55 2HL
• Sold Aug 2022£125,000 | 3 Bed House15, New Street, Caernarfon, LL55 2PU15, New Street, Caernarfon, LL55 2PU
• Sold Mar 2022£125,000 | 3 Bed House42, New Street, Caernarfon, LL55 2PU42, New Street, Caernarfon, LL55 2PU
• Sold Jan 2022£117,000 | 3 Bed House32, New Street, Caernarfon, LL55 2PU32, New Street, Caernarfon, LL55 2PU
• Sold Apr 2021£110,000 | 3 Bed House26, Pool Street, Caernarfon, LL55 2AB26, Pool Street, Caernarfon, LL55 2AB
• Sold Jan 2021£128,000 | 3 Bed House22, South Penrallt, Caernarfon, LL55 1NS22, South Penrallt, Caernarfon, LL55 1NS
• Sold Jan 2021£110,000 | 3 Bed House11, William Street, Caernarfon, LL55 1ND11, William Street, Caernarfon, LL55 1ND
• Sold Nov 2020£95,000 | 3 Bed House10, Constantine Terrace, Caernarfon, LL55 2HL10, Constantine Terrace, Caernarfon, LL55 2HL
• Sold Dec 2019£95,000 | 3 Bed House2, Constantine Terrace, Caernarfon, LL55 2HL2, Constantine Terrace, Caernarfon, LL55 2HL
• Sold Jan 2018£65,000 | 3 Bed House19, New Street, Caernarfon, LL55 2PU19, New Street, Caernarfon, LL55 2PU
• Sold Dec 2013£85,000 | 3 Bed House38, William Street, Caernarfon, LL55 1ND38, William Street, Caernarfon, LL55 1ND

Of the 39 addresses on William Street, Caernarfon, LL55, 45, William Street, Caernarfon comes out as the largest and the 4th most expensive in our analysis of the public data.

It is also £90k 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.