HM Land Registry records the plot of land for 11, Castle Street, Caernarfon as measuring 140 m².

That makes it the largest plot in the postcode, where 4 of the 7 other houses have recorded plot data.

11, Castle Street, Caernarfon has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 17 Oct 2024.

The property is connected to mains gas and has mostly secondary glazing. It is heated using a boiler and radiators (mains gas).

The most recent sale of 11, Castle Street, Caernarfon completed on 16th September 2010 at £80,000 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 117.4% over the period since September 2010.

Since 2015 68 properties similar to 11, Castle Street, Caernarfon have sold within a radius of 830 metres, per the Land Registry and our network of Estate Agents.

The latest, on the 27th May 2026, was 12, Vaynol Street, Caernarfon, LL55 2RL, a freehold house which sold for £226,000.

Read more about house prices in LL55.

• Sold May 2026£226,000 | 3 Bed House12, Vaynol Street, Caernarfon, LL55 2RL12, Vaynol Street, Caernarfon, LL55 2RL
• Sold Dec 2025£199,950 | 3 Bed HouseBryn Carrog, Mount Pleasant Square, Caernarfon, LL55 1PABryn Carrog, Mount Pleasant Square, Caernarfon, LL55 1PA
• Sold Nov 2025£202,500 | 3 Bed House18, Vaynol Street, Caernarfon, LL55 2RL18, Vaynol Street, Caernarfon, LL55 2RL
• Sold Jul 2025£140,000 | 3 Bed House8, Market Street, Caernarfon, LL55 1RT8, Market Street, Caernarfon, LL55 1RT
• Sold Jun 2025£242,500 | 3 Bed House10, Dinorwic Street, Caernarfon, LL55 2RG10, Dinorwic Street, Caernarfon, LL55 2RG
• Sold Feb 2025£158,000 | 4 Bed House19, Dinorwic Street, Caernarfon, LL55 2RG19, Dinorwic Street, Caernarfon, LL55 2RG
• Sold Jul 2024£120,000 | 3 Bed House21, Hole In The Wall Street, Caernarfon, LL55 1RF21, Hole In The Wall Street, Caernarfon, LL55 1RF
• Sold Jul 2024£192,500 | 3 Bed House30, Segontium Terrace, Caernarfon, LL55 2PH30, Segontium Terrace, Caernarfon, LL55 2PH
• Sold Jun 2024£175,000 | 3 Bed House9, Eleanor Street, Caernarfon, LL55 1PG9, Eleanor Street, Caernarfon, LL55 1PG
• Sold Mar 2024£655,000 | 3 Bed HouseGovernment Buildings, Penrallt, Caernarfon, LL55 1EPGovernment Buildings, Penrallt, Caernarfon, LL55 1EP
• Sold Sep 2023£196,000 | 3 Bed House22, Market Street, Caernarfon, LL55 1RT22, Market Street, Caernarfon, LL55 1RT
• Sold Jul 2023£170,000 | 3 Bed House22, Vaynol Street, Caernarfon, LL55 2RL22, Vaynol Street, Caernarfon, LL55 2RL
• Sold Nov 2022£147,500 | 3 Bed House28, Vaynol Street, Caernarfon, LL55 2RL28, Vaynol Street, Caernarfon, LL55 2RL
• Sold Dec 2021£165,000 | 3 Bed House16, Gelert Street, Caernarfon, LL55 2LH16, Gelert Street, Caernarfon, LL55 2LH
• Sold Oct 2021£115,000 | 4 Bed House15, Palace Street, Caernarfon, LL55 1RR15, Palace Street, Caernarfon, LL55 1RR
• Sold May 2021£107,500 | 3 Bed House5, Segontium Terrace, Caernarfon, LL55 2PN5, Segontium Terrace, Caernarfon, LL55 2PN
• Sold Apr 2021£180,000 | 3 Bed House6, Vaynol Street, Caernarfon, LL55 2RL6, Vaynol Street, Caernarfon, LL55 2RL
• Sold Nov 2020£195,000 | 4 Bed House14, Palace Street, Caernarfon, LL55 1RR14, Palace Street, Caernarfon, LL55 1RR
• Sold Dec 2019£143,000 | 4 Bed House27, Market Street, Caernarfon, LL55 1RT27, Market Street, Caernarfon, LL55 1RT
• Sold Oct 2015£117,000 | 3 Bed House33A, High Street, Caernarfon, LL55 1RH33A, High Street, Caernarfon, LL55 1RH

Of the 7 addresses on Castle Street, Caernarfon, LL55, 11, Castle Street, Caernarfon comes out as the 3rd largest and the 4th most expensive in our analysis of the public data.

It is also £17k less expensive than the average property across the LL55 district.

• Llanfairpwll

  |

  10.0 km away
• Bodorgan

  |

  11.8 km away
• Bangor (Gwynedd)

  |

  13.1 km away

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