38 Commercial Street, Ystradgynlais, Swansea, SA9 1JH
About 38 Commercial Street
38 Commercial Street is a detached house in Ystradgynlais, Swansea, Swansea (SA9 1JH). It has a recorded floor area of 121 m² (around 1302 sq ft), construction records dating it to before 1900 and council tax band C. The latest certificate (May 2025) returns a high B (score 91), putting the home a stone's throw from an A rating. When first surveyed in March 2013 the rating was E, the property has climbed 3 bands since. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Poor to Good and main heating went from Average to Good. The recommended improvements would push it to A (score 97). Main heating runs on electricity.
At 121 m² the property is well over the postcode median (91 m² across 9 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode.
Know exactly what you're buying at 38 Commercial Street
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
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Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
38 Commercial Street ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heat pump installed, significantly improving energy efficiency
Switched from solid fuel to cleaner energy source
Heating controls upgraded for better temperature management
Hot water system upgraded
Wall insulation improved
Loft insulation upgraded to recommended levels
Planning history
38 Commercial Street has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 38 Commercial Street
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
38 Commercial Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£267,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in SA9 1JH: £135,000 (2024–2018).
Nearby sales in SA9 1JH
23 Commercial Street, Ystradgynlais, Swansea, SA9 1JH
Sold Jul 2024
£125,00035 Commercial Street, Ystradgynlais, Swansea, SA9 1JH
Sold Apr 2024
£135,00040 42, Commercial Street, Ystradgynlais, Swansea, SA9 1JH
Sold Jul 2021
£90,00019 Commercial Street, Ystradgynlais, Swansea, SA9 1JH
Sold Dec 2020
£225,000Flat, 50 Commercial Street, Ystradgynlais, Swansea, SA9 1JH
Sold Jul 2018
£250,000
Everything we know about 38 Commercial Street, 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 Commercial Street homes
EPC Rating for 38 Commercial Street runs comfortably ahead of the street norm.
EPC Rating
91 (B)
Street avg 55 (E)
Floor Area
121 m²
Street avg 99 m²
CO₂ Emissions
1.1 t/year
Street avg 6.2 t/year
Habitable Rooms
7 rooms
Street avg 5 rooms
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1 Abercrave Villas, Heol Tawe, Abercrave
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1 2 Metz Cottages, Ystradgynlais
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1 Astoria Place, Ystradgynlais
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1 Caerbont Cottages, Abercrave
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1 Caemaen, Brecon Road, Penycae
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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
Commercial Street — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.