21, Cwm Silyn, Caernarfon occupies a 260 m² plot as recorded by HM Land Registry.

Of the 26 other houses in this postcode, 15 have recorded plot sizes, and this one ranks as the 2nd largest.

21, Cwm Silyn, Caernarfon has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 25 Jul 2013.

The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

21, Cwm Silyn, Caernarfon last changed hands on 15th July 2016, selling for £166,000. The transaction was logged as a freehold house by HM Land Registry.

In total it has sold 3 times since 1995.

The market for similar properties has risen by 29.0% since July 2016.

• Sold Jul 2016£166,000
• Sold Mar 1999£55,000
• Sold Feb 1996£45,000

Land Registry records and our Estate Agent network show 143 sales of comparable properties within 790 metres of 21, Cwm Silyn, Caernarfon since 2016.

Most recently, 46, Ffordd Eryri, Caernarfon, LL55 2UR, a freehold house, sold at £210,000 on the 5th March 2026.

Read more about house prices in LL55.

• Sold Mar 2026£210,000 | 3 Bed House46, Ffordd Eryri, Caernarfon, LL55 2UR46, Ffordd Eryri, Caernarfon, LL55 2UR
• Sold Jan 2026£240,000 | 3 Bed House34, Caeau Bach, Caernarfon, LL55 2BZ34, Caeau Bach, Caernarfon, LL55 2BZ
• Sold Jan 2026£232,000 | 3 Bed House81, Ffordd Eryri, Caernarfon, LL55 2UR81, Ffordd Eryri, Caernarfon, LL55 2UR
• Sold Dec 2025£225,000 | 3 Bed House4, Cae'R Ysgol, Caernarfon, LL55 2LY4, Cae'R Ysgol, Caernarfon, LL55 2LY
• Sold Dec 2025£221,500 | 3 Bed House34, Maes Meddyg, Caernarfon, LL55 2SF34, Maes Meddyg, Caernarfon, LL55 2SF
• Sold Nov 2025£240,100 | 3 Bed House15, Maes Meddyg, Caernarfon, LL55 2SF15, Maes Meddyg, Caernarfon, LL55 2SF
• Sold Sep 2025£197,000 | 3 Bed House2, Maes Meddyg, Caernarfon, LL55 2SF2, Maes Meddyg, Caernarfon, LL55 2SF
• Sold Aug 2025£235,000 | 3 Bed House5, Cae'R Ysgol, Caernarfon, LL55 2LY5, Cae'R Ysgol, Caernarfon, LL55 2LY
• Sold Dec 2024£235,000 | 3 Bed House2, Gwel Y Llan, Caernarfon, LL55 2SJ2, Gwel Y Llan, Caernarfon, LL55 2SJ
• Sold Feb 2024£182,500 | 3 Bed House58, Tyddyn Llwydyn, Caernarfon, LL55 2LX58, Tyddyn Llwydyn, Caernarfon, LL55 2LX
• Sold Nov 2023£200,000 | 3 Bed House5, Caeau Bach, Caernarfon, LL55 2BZ5, Caeau Bach, Caernarfon, LL55 2BZ
• Sold Jul 2023£205,000 | 3 Bed House57, Ffordd Eryri, Caernarfon, LL55 2UR57, Ffordd Eryri, Caernarfon, LL55 2UR
• Sold Jun 2022£295,000 | 3 Bed House3, Caeau Bach, Caernarfon, LL55 2BZ3, Caeau Bach, Caernarfon, LL55 2BZ
• Sold Jan 2022£190,500 | 3 Bed House41, Ffordd Eryri, Caernarfon, LL55 2UR41, Ffordd Eryri, Caernarfon, LL55 2UR
• Sold Dec 2021£265,011 | 3 Bed House28, Tyddyn Llwydyn, Caernarfon, LL55 2LX28, Tyddyn Llwydyn, Caernarfon, LL55 2LX
• Sold Sep 2021£205,000 | 3 Bed House7, Caeau Bach, Caernarfon, LL55 2BZ7, Caeau Bach, Caernarfon, LL55 2BZ
• Sold Nov 2020£173,000 | 3 Bed House60, Ffordd Eryri, Caernarfon, LL55 2UR60, Ffordd Eryri, Caernarfon, LL55 2UR
• Sold Apr 2018£115,000 | 3 Bed House1, Bryn Hyfryd, Caernarfon, LL55 2UU1, Bryn Hyfryd, Caernarfon, LL55 2UU
• Sold Mar 2018£178,500 | 3 Bed House62, Tyddyn Llwydyn, Caernarfon, LL55 2LX62, Tyddyn Llwydyn, Caernarfon, LL55 2LX
• Sold Jul 2016£162,000 | 3 Bed House48, Ffordd Eryri, Caernarfon, LL55 2UR48, Ffordd Eryri, Caernarfon, LL55 2UR

Our analysis of the public data ranks 21, Cwm Silyn, Caernarfon as the 22nd largest and the 21st most expensive of the 26 addresses on Cwm Silyn, Caernarfon, LL55.

Against the LL55 postcode district average, it is £8k more expensive than the typical property.

• Llanfairpwll

  |

  10.5 km away
• Bangor (Gwynedd)

  |

  13.1 km away
• Bodorgan

  |

  13.1 km away

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