3 Ynyswen, Penycae, Swansea, SA9 1YS
About 3 Ynyswen
3 Ynyswen is a semi-detached house in Penycae, Swansea, Swansea (SA9 1YS). It has a recorded floor area of 79 m² (around 850 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (September 2021) shows an F (score 23), near the bottom of the EPC scale. The recommended improvements would push it to E (score 52). Main heating runs on lpg.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £144,000 sits 80% above the 2021 sale of £80,000. Last sale on file: £80,000 in September 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 3 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
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
3 Ynyswen sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Planning history
3 Ynyswen has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 3 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
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£144,000
Modelled from EPC, postcode comparables.
£80,000
Recorded with HM Land Registry.
Sales timeline
28 September 2021Most recent
£80,000
Median price across the last 5 sales in SA9 1YS: £153,000 (2025–2024).
Nearby sales in SA9 1YS
Everything we know about 3 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 epc rating, 3 Ynyswen runs well behind the street norm.
Price per m²
£1,013
Street avg £1,114
Floor Area
79 m²
Street avg 91 m²
Habitable Rooms
3 rooms
Street avg 6 rooms
CO₂ Emissions
5.7 t/year
Street avg 5.2 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.