Ynys Gyffylog, The Studio, Arthog, LL39 1BQ
About Ynys Gyffylog
Ynys Gyffylog is a semi-detached house in Arthog (LL39 1BQ). It has a recorded floor area of 50 m² (around 538 sq ft) and construction records dating it to 1996-2002. The latest certificate (June 2025) shows a D (score 61), on the cusp of jumping into the C band. Earlier certificates rated it C (November 2011); the latest reading is one band lower. Between certificates, window efficiency went from Average to Good and lighting went from Average to Very Good; while wall efficiency dropped from Very Good to Good. The recommended improvements would lift it to B (score 88), a 2-band jump. Main heating runs on electricity.
At 50 m² it sits well below the postcode median (127 m² across 7 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 86% of similar EPCs).
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
Wall insulation upgraded
More low energy lighting installed
Planning history
Ynys Gyffylog has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
Ynys Gyffylog has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£206,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in LL39 1BQ: £245,000 (2025–2023).
Everything we know about Ynys Gyffylog, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

Versus the street
Floor Area for Ynys Gyffylog lags the street by a wide margin.
EPC Rating
61 (D)
Street avg 41 (E)
Floor Area
50 m²
Street avg 128 m²
CO₂ Emissions
5.0 t/year
Street avg 12.5 t/year
Habitable Rooms
1 rooms
Street avg 6 rooms
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
1/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Morfa Mawddach Rail Station — railway station.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.