18, Trefonwys, Bangor occupies a 837 m² plot as recorded by HM Land Registry.

Of the 33 other houses in this postcode, 31 have recorded plot sizes, and this one ranks as the 8th largest.

18, Trefonwys, Bangor has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 25 May 2010.

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

18, Trefonwys, Bangor last changed hands on 15th April 2011, selling for £305,000. 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 7.4% since April 2011.

• Sold Apr 2011£305,000
• Sold Apr 2004£225,000

Land Registry records and our Estate Agent network show 47 sales of comparable properties within 630 metres of 18, Trefonwys, Bangor since 2012.

Most recently, 16, Lon Y Meillion, Bangor, LL57 2LE, a freehold house, sold at £325,000 on the 11th December 2025.

Read more about house prices in LL57.

• Sold Dec 2025£325,000 | 4 Bed House16, Lon Y Meillion, Bangor, LL57 2LE16, Lon Y Meillion, Bangor, LL57 2LE
• Sold May 2024£279,950 | 3 Bed House6, Lon Y Meillion, Bangor, LL57 2LE6, Lon Y Meillion, Bangor, LL57 2LE
• Sold May 2024£285,000 | 4 Bed House31, Bryn Eithinog, Bangor, LL57 2LA31, Bryn Eithinog, Bangor, LL57 2LA
• Sold Dec 2023£230,000 | 3 Bed House24, Bryn Eithinog, Bangor, LL57 2LA24, Bryn Eithinog, Bangor, LL57 2LA
• Sold Dec 2023£269,000 | 4 Bed House19, Bryn Eithinog, Bangor, LL57 2LA19, Bryn Eithinog, Bangor, LL57 2LA
• Sold Nov 2023£272,000 | 3 Bed House3, Belmont Drive, Bangor, LL57 2HS3, Belmont Drive, Bangor, LL57 2HS
• Sold Aug 2023£274,000 | 4 Bed House3, Lon Y Deri, Bangor, LL57 2LF3, Lon Y Deri, Bangor, LL57 2LF
• Sold May 2023£200,000 | 3 Bed House2, Lon Y Meillion, Bangor, LL57 2LE2, Lon Y Meillion, Bangor, LL57 2LE
• Sold Dec 2022£280,500 | 3 Bed House15, Bryn Eithinog, Bangor, LL57 2LA15, Bryn Eithinog, Bangor, LL57 2LA
• Sold Nov 2022£275,000 | 4 Bed House5, Lon Y Meillion, Bangor, LL57 2LE5, Lon Y Meillion, Bangor, LL57 2LE
• Sold Nov 2022£262,000 | 3 Bed House21, Bryn Eithinog, Bangor, LL57 2LA21, Bryn Eithinog, Bangor, LL57 2LA
• Sold Dec 2021£245,000 | 3 Bed House44, Bryn Eithinog, Bangor, LL57 2LA44, Bryn Eithinog, Bangor, LL57 2LA
• Sold Aug 2021£235,000 | 4 Bed House4, Min Menai, Bangor, LL57 2LB4, Min Menai, Bangor, LL57 2LB
• Sold Dec 2017£190,000 | 4 Bed House20, Bryn Eithinog, Bangor, LL57 2LA20, Bryn Eithinog, Bangor, LL57 2LA
• Sold Jun 2016£182,500 | 3 Bed House4, Bryn Eithinog, Bangor, LL57 2LA4, Bryn Eithinog, Bangor, LL57 2LA
• Sold Dec 2015£170,000 | 3 Bed House42, Bryn Eithinog, Bangor, LL57 2LA42, Bryn Eithinog, Bangor, LL57 2LA
• Sold Jun 2015£180,000 | 4 Bed House11, Bryn Eithinog, Bangor, LL57 2LA11, Bryn Eithinog, Bangor, LL57 2LA
• Sold Jul 2014£243,000 | 3 Bed House21, Trefonwys, Bangor, LL57 2HU21, Trefonwys, Bangor, LL57 2HU
• Sold Jan 2014£182,500 | 4 Bed House36, Bryn Eithinog, Bangor, LL57 2LA36, Bryn Eithinog, Bangor, LL57 2LA
• Sold Sep 2012£170,000 | 4 Bed House27, Bryn Eithinog, Bangor, LL57 2LA27, Bryn Eithinog, Bangor, LL57 2LA

Our analysis of the public data ranks 18, Trefonwys, Bangor as the 29th largest and the 27th most expensive of the 33 addresses on Trefonwys, Bangor, LL57.

Against the LL57 postcode district average, it is £90k more expensive than the typical property.

• Bangor (Gwynedd)

  |

  900 m away
• Llanfairpwll

  |

  4.0 km away
• Llanfairfechan

  |

  11.7 km away

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