101 Ynyswen, Penycae, Swansea, SA9 1YX
About 101 Ynyswen
101 Ynyswen is a three-bedroom semi-detached house in Penycae, Swansea, Swansea (SA9 1YX). It has a recorded floor area of 90 m² (around 969 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (June 2022) shows an E (score 43), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since February 2014. Between certificates, window efficiency went from Average to Good; while main heating dropped from Average to Poor. The recommended improvements would lift it to C (score 69), a 2-band jump. Main heating runs on lpg.
Across 1999–2017, sale prices on this property compounded at 7.5% per year. Today's modelled estimate of £145,000 sits 70.6% above the 2017 sale of £85,000. On a £-per-square-foot basis, the last sale (£88/sq ft) was about 23.3% above the typical sold price in the postcode. Last sold in June 2017, so it's been off the market for around 9 years.
Know exactly what you're buying at 101 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
- Bedrooms3
Outside
- Private gardenrear
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Cavity wall insulation installed
Low energy lighting percentage decreased
Heating controls upgraded for better temperature management
Window efficiency improved
More low energy lighting installed
Planning history
101 Ynyswen has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 101 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
101 Ynyswen has more than tripled in price since its earliest registered sale in 1999.
£145,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.5% per year over 18 years.
£85,000
Growth on file: 7.5% per year over 18 years.
Sales timeline
25 June 2017Most recent
£85,000
+23.2%over 12 years27 October 2004
£69,000
+200.0%over 5 years8 June 1999
£23,000
Median price across the last 5 sales in SA9 1YX: £105,000 (2021–2014).
Nearby sales in SA9 1YX
Everything we know about 101 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
CO₂ Emissions for 101 Ynyswen runs comfortably ahead of the street norm.
Price per m²
£944
Street avg £902
Floor Area
90 m²
Street avg 92 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
3.9 t/year
Street avg 5.8 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
Post Office — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.