11a, Cwmtawe Road, Ystradgynlais, Swansea, SA9 1QU
About 11a
11a is a detached house in Ystradgynlais, Swansea, Swansea (SA9 1QU). It has a recorded floor area of 141 m² (around 1519 sq ft), construction records dating it to 2003-2006 and council tax band D. The latest certificate (December 2009) shows a C (score 76), near the top of the C band. The latest certificate is from December 2009, so improvements made since then won't be reflected.
It hasn't traded since February 2000, a hold of 26 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 141 m² the property is well over the postcode median (96 m² across 24 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). Today's modelled estimate of £255,000 sits 415.2% above the 2000 sale of £49,500. On a £-per-square-foot basis, the last sale (£33/sq ft) was about 72.9% below the postcode norm.
Know exactly what you're buying at 11a
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
11a's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 14 Dec 2019
EPC Rating
Planning history
11a has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 11a
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
11a's modelled value sits at over four times its earliest registered sale price (2000).
£255,000
Modelled from EPC, postcode comparables.
£49,500
Recorded with HM Land Registry.
Sales timeline
29 February 2000Most recent
£49,500
Median price across the last 5 sales in SA9 1QU: £150,000 (2025–2021).
Nearby sales in SA9 1QU
35 Cwmtawe Road, Ystradgynlais, Swansea, SA9 1QU
Sold Oct 2025
£150,00011 Cwmtawe Road, Ystradgynlais, Swansea, SA9 1QU
Sold Jul 2022
£225,00029 Cwmtawe Road, Ystradgynlais, Swansea, SA9 1QU
Sold Aug 2021
£120,00038 Cwmtawe Road, Ystradgynlais, Swansea, SA9 1QU
Sold Jul 2021
£145,0005 Cwmtawe Road, Ystradgynlais, Swansea, SA9 1QU
Sold May 2021
£385,000
Everything we know about 11a, 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 Cwmtawe Road homes
On price per m², 11a runs well behind the street norm.
Price per m²
£351
Street avg £1,393
Floor Area
141 m²
Street avg 122 m²
Habitable Rooms
4 rooms
Street avg 6 rooms
CO₂ Emissions
3.2 t/year
Street avg 6.5 t/year
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Primary School — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.