According to data from HM Land Registry, Treflys, Caernarfon sits on a plot of 182 m².

We have plot size data on 11 out of 15 other houses in the postcode and Treflys, Caernarfon sits on the 4th largest plot.

Treflys, Caernarfon has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 08 Aug 2011.

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

According to HM Land Registry, Treflys, Caernarfon was last sold on 13th December 2013 for £95,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since December 2013, the market for similar properties has risen by 46.6%.

• Sold Dec 2013£95,000

According to the Land Registry and our network of Estate Agents, there have been 36 sales of properties similar to Treflys, Caernarfon within a radius of 2.9 kilometres since 2015.

The most recent example is 2 Brynhyfryd Terrace, Caernarfon, LL54 7AE, a freehold house which sold for £105,000 on the 12th November 2025.

Read more about house prices in LL54.

• Sold Nov 2025£105,000 | 2 Bed House2 Brynhyfryd Terrace, Caernarfon, LL54 7AE2 Brynhyfryd Terrace, Caernarfon, LL54 7AE
• Sold Mar 2025£98,000 | 2 Bed House9, Tre Ddafydd, Caernarfon, LL54 6PW9, Tre Ddafydd, Caernarfon, LL54 6PW
• Sold Jun 2024£85,000 | 2 Bed House45, High Street, Caernarfon, LL54 6PL45, High Street, Caernarfon, LL54 6PL
• Sold Jun 2024£110,000 | 2 Bed House16, Snowdon Street, Caernarfon, LL54 6NG16, Snowdon Street, Caernarfon, LL54 6NG
• Sold May 2024£120,000 | 3 Bed House6 Brynhyfryd Terrace, Caernarfon, LL54 7AE6 Brynhyfryd Terrace, Caernarfon, LL54 7AE
• Sold May 2024£107,000 | 3 Bed House13, Water Street, Caernarfon, LL54 6LR13, Water Street, Caernarfon, LL54 6LR
• Sold Mar 2024£115,000 | 2 Bed HouseLlys Ellen, Caernarfon, LL54 7ABLlys Ellen, Caernarfon, LL54 7AB
• Sold Oct 2023£142,500 | 3 Bed HouseIsfryn, Gladstone Terrace, Caernarfon, LL54 7TEIsfryn, Gladstone Terrace, Caernarfon, LL54 7TE
• Sold Aug 2023£118,000 | 2 Bed House1, County Road, Caernarfon, LL54 6ES1, County Road, Caernarfon, LL54 6ES
• Sold Jul 2023£42,500 | 3 Bed House59, High Street, Caernarfon, LL54 6PL59, High Street, Caernarfon, LL54 6PL
• Sold Jul 2022£98,500 | 3 Bed House57, High Street, Caernarfon, LL54 6PL57, High Street, Caernarfon, LL54 6PL
• Sold May 2022£151,505 | 3 Bed House22, Tre Ddafydd, Caernarfon, LL54 6PW22, Tre Ddafydd, Caernarfon, LL54 6PW
• Sold Dec 2021£125,000 | 3 Bed House5 Grugan Terrace, Caernarfon, LL54 7TD5 Grugan Terrace, Caernarfon, LL54 7TD
• Sold Jun 2021£74,950 | 3 Bed House43, High Street, Caernarfon, LL54 6PL43, High Street, Caernarfon, LL54 6PL
• Sold May 2021£84,000 | 3 Bed House11, Water Street, Caernarfon, LL54 6LR11, Water Street, Caernarfon, LL54 6LR
• Sold Jul 2020£88,000 | 2 Bed House37, High Street, Caernarfon, LL54 6PL37, High Street, Caernarfon, LL54 6PL
• Sold Dec 2019£62,000 | 2 Bed House1, Tre Ddafydd, Caernarfon, LL54 6PW1, Tre Ddafydd, Caernarfon, LL54 6PW
• Sold Jul 2018£77,500 | 3 Bed House7 Glynllifon Terrace, Caernarfon, LL54 7DE7 Glynllifon Terrace, Caernarfon, LL54 7DE
• Sold Sep 2015£87,000 | 2 Bed HouseBryn Clynnog, Caernarfon, LL54 7TDBryn Clynnog, Caernarfon, LL54 7TD
• Sold Aug 2015£67,500 | 3 Bed House24, Tre Ddafydd, Caernarfon, LL54 6PW24, Tre Ddafydd, Caernarfon, LL54 6PW

Groeslon, Caernarfon, LL54 has a total of 284 addresses. According to our analysis of all the public data, Treflys, Caernarfon is the 251st largest and the 272nd most expensive property on the street.

When compared to the postcode district it is £112k less expensive than the average property in LL54.

• Llanfairpwll

  |

  16.5 km away
• Bodorgan

  |

  16.7 km away
• Criccieth

  |

  18.0 km away

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