103 Ynyswen, Penycae, Swansea, SA9 1YX
About 103 Ynyswen
103 Ynyswen is a semi-detached house in Penycae, Swansea, Swansea (SA9 1YX). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (February 2014) shows an E (score 52), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since February 2014. Between certificates, roof efficiency went from Poor to Good. The recommended improvements would lift it to B (score 84), a 3-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 December 2000, a hold of 25 years that's notably long for the area. Across 1998–2000, sale prices on this property compounded at -5.1% per year. Today's modelled estimate of £147,000 sits 512.5% above the 2000 sale of £24,000. On a £-per-square-foot basis, the last sale (£25/sq ft) was about 65.1% below the postcode norm.
Know exactly what you're buying at 103 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
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 18 Feb 2024
EPC Rating
Property Improvements
Changes detected from historical EPC data
Loft insulation upgraded to recommended levels
Planning history
103 Ynyswen has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 103 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
103 Ynyswen's modelled value sits at over four times its earliest registered sale price (1998).
£147,000
Modelled from EPC, postcode comparables and a sale-price growth of -5.1% per year over 2 years.
£24,000
Growth on file: -5.1% per year over 2 years.
Sales timeline
18 December 2000Most recent
£24,000
-11.1%over 2 years24 September 1998
£27,000
Median price across the last 5 sales in SA9 1YX: £102,000 (2021–2016).
Nearby sales in SA9 1YX
Everything we know about 103 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
Years Held for 103 Ynyswen runs comfortably ahead of the street norm.
Price per m²
£273
Street avg £958
Floor Area
88 m²
Street avg 93 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
5.0 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.