99 Ynyswen, Penycae, Swansea, SA9 1YX
About 99 Ynyswen
99 Ynyswen is a three-bedroom semi-detached house in Penycae, Swansea, Swansea (SA9 1YX). It has a recorded floor area of 96 m² (around 1033 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (August 2014) shows an E (score 48), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 85), a 3-band jump. Main heating runs on oil. The latest certificate is from August 2014, so improvements made since then won't be reflected.
Today's modelled estimate of £156,000 sits 116.7% above the 2013 sale of £72,000. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. On the market in May 2013 and unlisted since — roughly 13 years.
Know exactly what you're buying at 99 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
Energy performance
99 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This certificate is over 10 years old and is no longer valid.Expired 17 Aug 2024
EPC Rating
Planning history
Council records include a two-storey side extension at 99 Ynyswen.
- Apr 2016ConditionsIn report
Discharge of condtion 3 pursuant to Planning Permission 15/11820/FUL
- Documents
- 5 docs on file
- Reference
- 16/13323/DISCON
- Apr 2015ExtensionFullIn report
Extension: Two storey · Side of property
Proposed 2 storey side extension.
- Documents
- 28 docs on file
- Reference
- 15/11820/FUL
We flagged 1 thing worth checking at 99 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
99 Ynyswen valuation sits well clear of the typical sold price in this postcode.
£156,000
Modelled from EPC, postcode comparables.
£72,000
Recorded with HM Land Registry.
Sales timeline
29 May 2013Most recent
£72,000
Median price across the last 5 sales in SA9 1YX: £102,000 (2021–2016).
Nearby sales in SA9 1YX
Everything we know about 99 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, 99 Ynyswen runs well behind the street norm.
Price per m²
£750
Street avg £918
Floor Area
96 m²
Street avg 92 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
6.4 t/year
Street avg 5.7 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.