23 Ynyswen, Penycae, Swansea, SA9 1YS
About 23 Ynyswen
23 Ynyswen is a semi-detached house in Penycae, Swansea, Swansea (SA9 1YS). It has a recorded floor area of 117 m² (around 1259 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (February 2014) shows an E (score 51), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since February 2014. The recommended improvements would lift it to C (score 76), a 2-band jump. Main heating runs on oil. The latest certificate is from February 2014, so improvements made since then won't be reflected.
It hasn't traded since February 2002, a hold of 24 years that's notably long for the area. At 117 m² the property is well over the postcode median (88 m² across 30 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs). Today's modelled estimate of £176,000 sits 433.3% above the 2002 sale of £33,000. On a £-per-square-foot basis, the last sale (£26/sq ft) was about 70.3% below the postcode norm.
Know exactly what you're buying at 23 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
Energy performance
23 Ynyswen's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 14 Feb 2024
EPC Rating
Planning history
23 Ynyswen has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 23 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
30-day money-back guarantee
Sales history & valuation
23 Ynyswen's modelled value sits at over four times its earliest registered sale price (2002).
£176,000
Modelled from EPC, postcode comparables.
£33,000
Recorded with HM Land Registry.
Sales timeline
28 February 2002Most recent
£33,000
Median price across the last 5 sales in SA9 1YS: £153,000 (2025–2024).
Nearby sales in SA9 1YS
Everything we know about 23 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
Price per m² for 23 Ynyswen lags the street by a wide margin.
Price per m²
£282
Street avg £1,170
Floor Area
117 m²
Street avg 89 m²
Habitable Rooms
7 rooms
Street avg 5 rooms
CO₂ Emissions
7.6 t/year
Street avg 5.1 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.