17 Blaen Y Cwm Terrace, Treherbert, Treorchy, CF42 5ND
About 17 Blaen Y Cwm Terrace
17 Blaen Y Cwm Terrace is a mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5ND). It has a recorded floor area of 104 m² (around 1119 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (June 2019) shows a C (score 69), just inside the C band. When first surveyed in May 2019 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Good to Very Good. The recommended improvements would push it to B (score 86).
Untraded for 29 years, with the last transfer in April 1997. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 104 m² the property is well over the postcode median (76 m² across 54 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £136,000 sits 547.6% above the 1997 sale of £21,000. On a £-per-square-foot basis, the last sale (£19/sq ft) was about 62.6% below the postcode norm.
Know exactly what you're buying at 17 Blaen Y Cwm Terrace
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
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
More low energy lighting installed
Planning history
17 Blaen Y Cwm Terrace has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 17 Blaen Y Cwm Terrace
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
17 Blaen Y Cwm Terrace's modelled value sits at over four times its earliest registered sale price (1997).
£136,000
Modelled from EPC, postcode comparables.
£21,000
Recorded with HM Land Registry.
Sales timeline
17 April 1997Most recent
£21,000
Median price across the last 5 sales in CF42 5ND: £70,000 (2025–2024).
Nearby sales in CF42 5ND
6 Blaen Y Cwm Terrace, Treherbert, Treorchy, CF42 5ND
Sold Jul 2025
£70,00042 Blaen Y Cwm Terrace, Treherbert, Treorchy, CF42 5ND
Sold Jul 2025
£68,00016 Blaen Y Cwm Terrace, Treherbert, Treorchy, CF42 5ND
Sold Dec 2024
£65,00057 Blaen Y Cwm Terrace, Treherbert, Treorchy, CF42 5ND
Sold Nov 2024
£77,00027 Blaen Y Cwm Terrace, Treherbert, Treorchy, CF42 5ND
Sold Nov 2024
£111,500
Everything we know about 17 Blaen Y Cwm Terrace, 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 Blaen Y Cwm Terrace homes
On price per m², 17 Blaen Y Cwm Terrace runs well behind the street norm.
Price per m²
£202
Street avg £835
Floor Area
104 m²
Street avg 78 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
4.9 t/year
Street avg 4.4 t/year
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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
St Alban`s — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.