11 Gwendoline Street, Treherbert, Treorchy, CF42 5BW
About 11 Gwendoline Street
11 Gwendoline Street is a three-bedroom mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5BW). It has a recorded floor area of 68 m² (around 732 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (September 2024) shows a C (score 76), near the top of the C band. When first surveyed in June 2017 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Very Poor to Very Good and lighting went from Poor to Very Good. The recommended improvements would push it to B (score 89).
At 68 m² it's 26.1% smaller than the typical home in the postcode (92 m² median across 23 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £122,000 sits 154.2% above the 2018 sale of £48,000. On a £-per-square-foot basis, the last sale (£66/sq ft) was about 36.3% above the typical sold price in the postcode. 8 years since the last transfer (March 2018).
Know exactly what you're buying at 11 Gwendoline 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
What this property has
Inside
- Bedrooms3
- Bathrooms2
Energy performance
11 Gwendoline Street ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Wall insulation improved
Loft insulation installed or upgraded to 250mm+
Floor insulation added or improved
More low energy lighting installed
Planning history
11 Gwendoline Street has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 11 Gwendoline 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
11 Gwendoline Street's sale-price growth has lagged the wider UK trajectory across its history on file.
£122,000
Modelled from EPC, postcode comparables and a sale-price growth of 0.2% per year over 11 years.
£48,000
Growth on file: 0.2% per year over 11 years.
Sales timeline
23 March 2018Most recent
£48,000
+2.1%over 11 years4 December 2006
£47,000
Median price across the last 5 sales in CF42 5BW: £65,500 (2024–2019).
Nearby sales in CF42 5BW
10 Gwendoline Street, Treherbert, Treorchy, CF42 5BW
Sold Jun 2024
£132,50093a, Gwendoline Street, Treherbert, Treorchy, CF42 5BW
Sold Jan 2024
£35,0004 Gwendoline Street, Treherbert, Treorchy, CF42 5BW
Sold Jan 2023
£216,00093 Gwendoline Street, Treherbert, Treorchy, CF42 5BW
Sold Mar 2022
£65,50095 Gwendoline Street, Treherbert, Treorchy, CF42 5BW
Sold Dec 2019
£65,000
Everything we know about 11 Gwendoline 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 Gwendoline Street homes
On epc rating, 11 Gwendoline Street stands well clear of the street.
Price per m²
£706
Street avg £724
Floor Area
68 m²
Street avg 95 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
2.5 t/year
Street avg 5.3 t/year
Similar properties nearby
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1 Blaen Y Cwm Terrace, Treherbert
CF42 5ND
1 Brook Street, Blaenrhondda
CF42 5SG
1 Cwrt Yr Ysgol, Treherbert
CF42 5PX
1 Corbett Street, Treherbert
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Wyndham Hotel — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.