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Get started1 Bryn Sisillt is a two-bedroom end-of-terrace house in Llanllyfni, Caernarfon, Caernarfon (LL54 6SP). It has a recorded floor area of 75 m² (around 807 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (October 2024) shows an E (score 53), well below the UK norm with real room to improve. When first surveyed in July 2019 the rating was G, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Very Poor to Good, lighting went from Very Poor to Very Good and main heating went from Very Poor to Good; while wall efficiency dropped from Good to Very Poor. The recommended improvements would lift it to B (score 85), a 3-band jump. Period features are noted in the property record. The home occupies a cul-de-sac position.
Sale prices here have outpaced England HPI: 13.2% per year against 0.3% for the wider region. Today's modelled estimate of £149,000 is 14.6% above the 2025 sale price. A recent sale: £130,000 in October 2025.
Recommended upgrades on file would lift this property by multiple EPC bands.
1 Bryn Sisillt has more than doubled in price since the earliest registered sale in 2020.
£149,000
Modelled from EPC, postcode comparables and a sale-price growth of 13.2% per year over 6 years.
£130,000
Growth on file: 13.2% per year over 6 years.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Ysgol Gynradd Llanllyfni — bus stop.
Changes detected from historical EPC data
Upgraded to gas central heating
Heating controls upgraded for better temperature management
Hot water system upgraded
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
15 October 2025Most recent
£130,000
+103.1%over 5 years22 January 2020
£64,000
Median price across the last 3 sales in LL54 6SP: £53,000 (2024–1996).
LL54 6HR
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