40 Ynyswen, Penycae, Swansea, SA9 1YS
About 40 Ynyswen
40 Ynyswen is a four-bedroom semi-detached house in Penycae, Swansea, Swansea (SA9 1YS). It has a recorded floor area of 106 m² (around 1141 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (August 2019) shows an F (score 26), near the bottom of the EPC scale. The rating has held steady at F across 3 certificates since April 2015. Between certificates, lighting went from Good to Very Good; while hot-water efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to D (score 66), a 2-band jump. Main heating runs on dual fuel.
At 106 m² it's 20.5% larger than the typical home in the postcode (88 m² median across 30 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £174,000 sits 83.2% above the 2019 sale of £95,000. Most recent transfer: September 2019 at £95,000.
Know exactly what you're buying at 40 Ynyswen
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Launch offer · save £5
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms4
- Bathrooms1
Energy performance
40 Ynyswen sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Changed to a more efficient fuel source
Hot water system changed
More low energy lighting installed
Planning history
40 Ynyswen has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 40 Ynyswen
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
40 Ynyswen valuation sits well clear of the typical sold price in this postcode.
£174,000
Modelled from EPC, postcode comparables.
£95,000
Recorded with HM Land Registry.
Sales timeline
26 September 2019Most recent
£95,000
Median price across the last 5 sales in SA9 1YS: £153,000 (2025–2024).
Nearby sales in SA9 1YS
Everything we know about 40 Ynyswen, 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 Ynyswen homes
On co₂ emissions, 40 Ynyswen runs well behind the street norm.
Price per m²
£896
Street avg £1,123
Floor Area
106 m²
Street avg 90 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
11.0 t/year
Street avg 5.0 t/year
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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
Ynyswen — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.