11 Commercial Street, Ystradgynlais, Swansea, SA9 1HD
About 11 Commercial Street
11 Commercial Street is a mid-terrace house in Ystradgynlais, Swansea, Swansea (SA9 1HD). It has a recorded floor area of 100 m² (around 1076 sq ft), construction records dating it to before 1900 and council tax band B. The latest certificate (June 2019) shows an E (score 48), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 78), a 2-band jump.
Across 1999–2019, sale prices on this property compounded at 6.4% per year. Today's modelled estimate of £154,000 sits 83.3% above the 2019 sale of £84,000. On a £-per-square-foot basis, the last sale (£78/sq ft) was about 31.2% below the postcode norm. Last sale on file: £84,000 in August 2019.
Know exactly what you're buying at 11 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
11 Commercial Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Planning history
11 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 11 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
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Sales history & valuation
Sale price has grown by over 3x since 1999.
£154,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.4% per year over 20 years.
£84,000
Growth on file: 6.4% per year over 20 years.
Sales timeline
6 August 2019Most recent
£84,000
+236.0%over 19 years20 December 1999
£25,000
Median price across the last 4 sales in SA9 1HD: £90,000 (2022–2016).
Nearby sales in SA9 1HD
Everything we know about 11 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
48 (E)
Street avg 55 (E)
Floor Area
100 m²
Street avg 99 m²
CO₂ Emissions
7.3 t/year
Street avg 6.4 t/year
Habitable Rooms
5 rooms
Street avg 5 rooms
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 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.