According to data from HM Land Registry, 11, Mountain Street, Caernarfon sits on a plot of 58 m².

We have plot size data on 22 out of 40 other houses in the postcode and 11, Mountain Street, Caernarfon sits on the 14th largest plot.

11, Mountain Street, Caernarfon has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 16 Oct 2018.

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

According to HM Land Registry, 11, Mountain Street, Caernarfon was last sold on 8th October 2025 for £125,000 and was recorded as a freehold house.

The property has had 3 sales since 1995.

Since October 2025, the market for similar properties has dropped by 3.5%.

• Sold Oct 2025£125,000
• Sold Jan 1998£31,600
• Sold Jan 1995£34,000

According to the Land Registry and our network of Estate Agents, there have been 98 sales of properties similar to 11, Mountain Street, Caernarfon within a radius of 520 metres since 2010.

The most recent example is 4, Mary Street, Caernarfon, LL55 1NE, a freehold house which sold for £118,500 on the 5th June 2026.

Read more about house prices in LL55.

• Sold Jun 2026£118,500 | 2 Bed House4, Mary Street, Caernarfon, LL55 1NE4, Mary Street, Caernarfon, LL55 1NE
• Sold Dec 2025£147,500 | 3 Bed House34, Margaret Street, Caernarfon, LL55 1NB34, Margaret Street, Caernarfon, LL55 1NB
• Sold Apr 2025£155,000 | 3 Bed House33, Victoria Street, Caernarfon, LL55 1PN33, Victoria Street, Caernarfon, LL55 1PN
• Sold Sep 2024£170,000 | 3 Bed House51, Mountain Street, Caernarfon, LL55 1PW51, Mountain Street, Caernarfon, LL55 1PW
• Sold Sep 2024£170,000 | 3 Bed House53, Mountain Street, Caernarfon, LL55 1PW53, Mountain Street, Caernarfon, LL55 1PW
• Sold Sep 2024£167,500 | 3 Bed House7, Eleanor Street, Caernarfon, LL55 1PG7, Eleanor Street, Caernarfon, LL55 1PG
• Sold Aug 2024£147,000 | 3 Bed House38, Margaret Street, Caernarfon, LL55 1NB38, Margaret Street, Caernarfon, LL55 1NB
• Sold Jul 2024£152,000 | 3 Bed House26, Edward Street, Caernarfon, LL55 1PH26, Edward Street, Caernarfon, LL55 1PH
• Sold Jul 2024£111,000 | 3 Bed House37, William Street, Caernarfon, LL55 1ND37, William Street, Caernarfon, LL55 1ND
• Sold Jun 2024£132,500 | 3 Bed House15, Margaret Street, Caernarfon, LL55 1NB15, Margaret Street, Caernarfon, LL55 1NB
• Sold Feb 2024£109,000 | 3 Bed House57, Mountain Street, Caernarfon, LL55 1PW57, Mountain Street, Caernarfon, LL55 1PW
• Sold Nov 2023£130,000 | 3 Bed House2, Mary Street, Caernarfon, LL55 1NE2, Mary Street, Caernarfon, LL55 1NE
• Sold Sep 2023£162,000 | 3 Bed House34, Victoria Street, Caernarfon, LL55 1PN34, Victoria Street, Caernarfon, LL55 1PN
• Sold Oct 2021£129,500 | 3 Bed House13, Mountain Street, Caernarfon, LL55 1PW13, Mountain Street, Caernarfon, LL55 1PW
• Sold May 2020£125,000 | 3 Bed House49, Mountain Street, Caernarfon, LL55 1PW49, Mountain Street, Caernarfon, LL55 1PW
• Sold Mar 2016£95,000 | 3 Bed House45, Mountain Street, Caernarfon, LL55 1PW45, Mountain Street, Caernarfon, LL55 1PW
• Sold Feb 2015£97,500 | 3 Bed House43, Mountain Street, Caernarfon, LL55 1PW43, Mountain Street, Caernarfon, LL55 1PW
• Sold Feb 2015£125,000 | 3 Bed House29, Mountain Street, Caernarfon, LL55 1PW29, Mountain Street, Caernarfon, LL55 1PW
• Sold Jun 2014£117,500 | 3 Bed House35, Mountain Street, Caernarfon, LL55 1PW35, Mountain Street, Caernarfon, LL55 1PW
• Sold Nov 2010£107,000 | 3 Bed House19, Mountain Street, Caernarfon, LL55 1PW19, Mountain Street, Caernarfon, LL55 1PW

Mountain Street, Caernarfon, LL55 has a total of 40 addresses. According to our analysis of all the public data, 11, Mountain Street, Caernarfon is the 22nd largest and the 22nd most expensive property on the street.

When compared to the postcode district it is £89k less expensive than the average property in LL55.

• Llanfairpwll

  |

  9.7 km away
• Bodorgan

  |

  12.2 km away
• Bangor (Gwynedd)

  |

  12.6 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.