5 Derwen Road, Ystradgynlais, Swansea, SA9 1HL
About 5 Derwen Road
5 Derwen Road is a semi-detached house in Ystradgynlais, Swansea, Swansea (SA9 1HL). It has a recorded floor area of 117 m² (around 1259 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (September 2025) shows a C (score 72).
Untraded for 25 years, with the last transfer in October 2001. On energy efficiency it sits in the top 10% of properties in this postcode. Across 1999–2001, sale prices on this property compounded at 7.4% per year. Today's modelled estimate of £267,000 sits 348.7% above the 2001 sale of £59,500. On a £-per-square-foot basis, the last sale (£47/sq ft) was about 60.1% below the postcode norm.
Know exactly what you're buying at 5 Derwen Road
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
5 Derwen Road ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Planning history
5 Derwen Road has no planning applications on record.
Notable planning nearby
2applications of note in the surrounding area
We flagged 1 thing worth checking at 5 Derwen Road
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
5 Derwen Road's modelled value sits at over four times its earliest registered sale price (1999).
£267,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.4% per year over 2 years.
£59,500
Growth on file: 7.4% per year over 2 years.
Sales timeline
11 October 2001Most recent
£59,500
+15.5%over 2 years7 October 1999
£51,500
Median price across the last 5 sales in SA9 1HL: £185,000 (2025–2015).
Nearby sales in SA9 1HL
12 Derwen Road, Ystradgynlais, Swansea, SA9 1HL
Sold Aug 2025
£260,0004 Derwen Road, Ystradgynlais, Swansea, SA9 1HL
Sold Apr 2021
£258,0006 Derwen Road, Ystradgynlais, Swansea, SA9 1HL
Sold Jan 2017
£165,0003 Derwen Road, Ystradgynlais, Swansea, SA9 1HL
Sold Mar 2015
£122,25010 Derwen Road, Ystradgynlais, Swansea, SA9 1HL
Sold Sept 2003
£115,000
Everything we know about 5 Derwen Road, 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 Derwen Road homes
On price per m², 5 Derwen Road runs well behind the street norm.
Price per m²
£509
Street avg £1,724
Floor Area
117 m²
Street avg 117 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
3.9 t/year
Street avg 5.4 t/year
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1 2 Metz Cottages, Ystradgynlais
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1 Astoria Place, Ystradgynlais
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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
Teddy Bear Bridge — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.