4 Dol Y Dderwen, Ystradgynlais, Swansea, SA9 1QJ
About 4 Dol Y Dderwen
4 Dol Y Dderwen is a detached house in Ystradgynlais, Swansea, Swansea (SA9 1QJ). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1996-2002 and council tax band A. At 49 m² this is the 4th smallest of 22 units on EPC record in the building, where floor areas span 32–172 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (November 2021) shows a C (score 75), near the top of the C band.
At 49 m² it's 29% smaller than the typical home in the postcode (69 m² median across 21 EPCs).
Know exactly what you're buying at 4 Dol Y Dderwen
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
EPC Rating
Planning history
4 Dol Y Dderwen has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 4 Dol Y Dderwen
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
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Sales history & valuation
4 Dol Y Dderwen has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£132,000
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 SA9 1QJ: £116,000 (2016–1996).
Everything we know about 4 Dol Y Dderwen, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Dol Y Dderwen homes
Floor Area for 4 Dol Y Dderwen runs comfortably ahead of the street norm.
EPC Rating
75 (C)
Street avg 75 (C)
Floor Area
49 m²
Street avg 32 m²
CO₂ Emissions
1.7 t/year
Street avg 1.5 t/year
Habitable Rooms
2 rooms
Street avg 1 rooms
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Lluest — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.