20 Glanselsig Street, Blaencwm, Treorchy, CF42 5EB
About 20 Glanselsig Street
20 Glanselsig Street is a semi-detached house in Blaencwm, Treorchy, Treorchy (CF42 5EB). It has a recorded floor area of 89 m² (around 958 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (July 2018) shows a D (score 60), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 85), a 2-band jump.
At 89 m² the property is well over the postcode median (64 m² across 17 EPCs), placing it in the larger end of the local stock. Across 2019–2022, sale prices on this property compounded at 9.3% per year. Today's modelled estimate of £124,000 sits 54% above the 2022 sale of £80,500. Most recent transfer: February 2022 at £80,500. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 20 Glanselsig 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
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
20 Glanselsig Street has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 20 Glanselsig 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.
- Signs of HMO activity in the area
30-day money-back guarantee
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£124,000
Modelled from EPC, postcode comparables and a sale-price growth of 9.3% per year over 3 years.
£80,500
Growth on file: 9.3% per year over 3 years.
Sales timeline
2 February 2022Most recent
£80,500
+26.8%over 2 years30 May 2019
£63,500
Median price across the last 5 sales in CF42 5EB: £72,000 (2024–2018).
Nearby sales in CF42 5EB
3 Glanselsig Street, Blaencwm, Treorchy, CF42 5EB
Sold Oct 2024
£95,0009 Glanselsig Street, Blaencwm, Treorchy, CF42 5EB
Sold Nov 2023
£72,00010 Glanselsig Street, Blaencwm, Treorchy, CF42 5EB
Sold Dec 2022
£142,0006 Glanselsig Street, Blaencwm, Treorchy, CF42 5EB
Sold Oct 2021
£50,00017 Glanselsig Street, Blaencwm, Treorchy, CF42 5EB
Sold Oct 2018
£53,195
Everything we know about 20 Glanselsig 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
- Signs of HMO activity in the area

Versus other Glanselsig Street homes
20 Glanselsig Street outperforms the street on floor area by a wide margin.
Price per m²
£904
Street avg £1,163
Floor Area
89 m²
Street avg 70 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
5.8 t/year
Street avg 4.2 t/year
Similar properties nearby
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1 Corbett Street, Treherbert
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1 Cwmsaerbren Flats, Treherbert
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1 Bryn Henllan, Blaenrhondda
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The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Blaencwm Post Office — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.