13, Mountain Street, Caernarfon occupies a 58 m² plot as recorded by HM Land Registry.

Of the 40 other houses in this postcode, 22 have recorded plot sizes, and this one ranks as the 7th largest.

13, Mountain Street, Caernarfon has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 30 Sep 2016.

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

13, Mountain Street, Caernarfon last changed hands on 8th October 2021, selling for £129,500. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold twice since 1995.

The market for similar properties has risen by 6.5% since October 2021.

• Sold Oct 2021£129,500
• Sold May 2013£101,348

Land Registry records and our Estate Agent network show 125 sales of comparable properties within 520 metres of 13, Mountain Street, Caernarfon since 2010.

Most recently, 34, Margaret Street, Caernarfon, LL55 1NB, a freehold house, sold at £147,500 on the 19th December 2025.

Read more about house prices in LL55.

• Sold Dec 2025£147,500 | 3 Bed House34, Margaret Street, Caernarfon, LL55 1NB34, Margaret Street, Caernarfon, LL55 1NB
• Sold Oct 2025£125,000 | 3 Bed House11, Mountain Street, Caernarfon, LL55 1PW11, Mountain Street, Caernarfon, LL55 1PW
• Sold Apr 2025£155,000 | 3 Bed House33, Victoria Street, Caernarfon, LL55 1PN33, Victoria Street, Caernarfon, LL55 1PN
• Sold Nov 2024£157,000 | 3 Bed House6, Margaret Street, Caernarfon, LL55 1NB6, Margaret Street, Caernarfon, LL55 1NB
• 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 Aug 2024£147,000 | 3 Bed House38, Margaret Street, Caernarfon, LL55 1NB38, Margaret Street, Caernarfon, LL55 1NB
• 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 Jun 2021£137,600 | 3 Bed House10, Victoria Street, Caernarfon, LL55 1PN10, Victoria Street, Caernarfon, LL55 1PN
• Sold Jan 2021£135,000 | 3 Bed House15, Mountain Street, Caernarfon, LL55 1PW15, Mountain Street, Caernarfon, LL55 1PW
• Sold Jan 2021£110,000 | 3 Bed House33, Mountain Street, Caernarfon, LL55 1PW33, 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

Our analysis of the public data ranks 13, Mountain Street, Caernarfon as the 16th largest and the 16th most expensive of the 40 addresses on Mountain Street, Caernarfon, LL55.

Against the LL55 postcode district average, it is £84k less expensive than the typical property.

• Llanfairpwll

  |

  9.7 km away
• Bodorgan

  |

  12.2 km away
• Bangor (Gwynedd)

  |

  12.6 km away

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