4, Castle Street, Caernarfon last changed hands on 1st July 2025, selling for £160,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 43.8% since July 2025.

• Sold Jul 2025£160,000

Land Registry records and our Estate Agent network show 120 sales of comparable properties within 830 metres of 4, Castle Street, Caernarfon since 2015.

Most recently, 9, Hampton Road, Caernarfon, LL55 1BP, a freehold house, sold at £169,000 on the 29th May 2026.

Read more about house prices in LL55.

• Sold May 2026£169,000 | 3 Bed House9, Hampton Road, Caernarfon, LL55 1BP9, Hampton Road, Caernarfon, LL55 1BP
• Sold Feb 2026£162,000 | 3 Bed House45, Eleanor Street, Caernarfon, LL55 1PG45, Eleanor Street, Caernarfon, LL55 1PG
• Sold Feb 2026£155,000 | 3 Bed House16, Bank Quay, Caernarfon, LL55 1SU16, Bank Quay, Caernarfon, LL55 1SU
• Sold Feb 2026£180,000 | 3 Bed House28, Victoria Street, Caernarfon, LL55 1PN28, Victoria Street, Caernarfon, LL55 1PN
• Sold Jun 2025£165,000 | 3 Bed House10, Eleanor Street, Caernarfon, LL55 1PG10, Eleanor Street, Caernarfon, LL55 1PG
• Sold Feb 2025£168,500 | 3 Bed House6, Edward Street, Caernarfon, LL55 1PH6, Edward Street, Caernarfon, LL55 1PH
• Sold Dec 2024£158,000 | 3 Bed House21, Edward Street, Caernarfon, LL55 1PH21, Edward Street, Caernarfon, LL55 1PH
• Sold Nov 2024£145,000 | 3 Bed House34, Eleanor Street, Caernarfon, LL55 1PG34, Eleanor Street, Caernarfon, LL55 1PG
• Sold Oct 2024£170,000 | 3 Bed House9, Edward Street, Caernarfon, LL55 1PH9, Edward Street, Caernarfon, LL55 1PH
• Sold Sep 2024£155,000 | 3 Bed House19, Edward Street, Caernarfon, LL55 1PH19, Edward Street, Caernarfon, LL55 1PH
• Sold Aug 2024£140,000 | 3 Bed House14, Victoria Street, Caernarfon, LL55 1PN14, Victoria Street, Caernarfon, LL55 1PN
• Sold Apr 2024£140,000 | 3 Bed House19, Snowdon Street, Caernarfon, LL55 2RD19, Snowdon Street, Caernarfon, LL55 2RD
• Sold Feb 2024£133,000 | 3 Bed House10, Edward Street, Caernarfon, LL55 1PH10, Edward Street, Caernarfon, LL55 1PH
• Sold Dec 2023£148,000 | 3 Bed House23, Victoria Street, Caernarfon, LL55 1PN23, Victoria Street, Caernarfon, LL55 1PN
• Sold Sep 2023£180,000 | 3 Bed House3, Hill Street, Caernarfon, LL55 1PL3, Hill Street, Caernarfon, LL55 1PL
• Sold Dec 2022£165,000 | 3 Bed House12, Hill Street, Caernarfon, LL55 1PL12, Hill Street, Caernarfon, LL55 1PL
• Sold Oct 2022£145,000 | 3 Bed House18, Edward Street, Caernarfon, LL55 1PH18, Edward Street, Caernarfon, LL55 1PH
• Sold Jul 2022£160,000 | 3 Bed House8, Hill Street, Caernarfon, LL55 1PL8, Hill Street, Caernarfon, LL55 1PL
• Sold Oct 2021£143,000 | 3 Bed House10, Hill Street, Caernarfon, LL55 1PL10, Hill Street, Caernarfon, LL55 1PL
• Sold Oct 2015£107,000 | 3 Bed House13, Castle Street, Caernarfon, LL55 1SE13, Castle Street, Caernarfon, LL55 1SE

Our analysis of the public data ranks 4, Castle Street, Caernarfon as the 4th largest and the 5th most expensive of the 7 addresses on Castle Street, Caernarfon, LL55.

Against the LL55 postcode district average, it is £51k less expensive than the typical property.

• Llanfairpwll

  |

  10.0 km away
• Bodorgan

  |

  11.8 km away
• Bangor (Gwynedd)

  |

  13.1 km away

Environment Agency data suggests this area has a Very Low risk of flooding.