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Get started1 Cefn Dyffryn is a detached house in Groeslon, Caernarfon, Caernarfon (LL54 7TQ). It has a recorded floor area of 127 m² (around 1367 sq ft), construction records dating it to 2003-2006 and council tax band D. The latest certificate (September 2023) shows a C (score 77), near the top of the C band. The rating has held steady at C across 2 certificates since December 2020. Between certificates, roof efficiency went from Good to Very Good; while wall efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 85).
Sale prices here have outpaced England HPI: 2.3% per year against 0% for the wider region. Today's modelled estimate of £333,000 is 21.1% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£201/sq ft) was about 41.1% above the typical sold price in the postcode. Sold December 2021 for £275,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. One historical planning record sits against the property in 2005.
MODURDY DWBL/DOUBLE GARAGE
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£333,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.3% per year over 17 years.
£275,000
Growth on file: 2.3% per year over 17 years.
1 Cefn Dyffryn outperforms the street on price per m² by a wide margin.
Price per m²
£2,165
Street avg £1,651
Floor Area
127 m²
Street avg 125 m²
Habitable Rooms
7 rooms
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Cae Sarn — bus stop.
Changes detected from historical EPC data
Cavity wall insulation installed
Roof insulation improved
Are we missing something? Tell us about home improvements to help adjust your valuation.
20 December 2021Most recent
£275,000
+48.6%over 17 years23 August 2004
£185,000
Median price across the last 5 sales in LL54 7TQ: £268,000 (2024–2019).
Street avg 6 rooms
CO₂ Emissions
3.1 t/year
Street avg 3.8 t/year
LL54 7BB
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