15 Gwendoline Street, Treherbert, Treorchy, CF42 5BW
About 15 Gwendoline Street
15 Gwendoline Street is a three-bedroom mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5BW). It has a recorded floor area of 69 m² (around 743 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (June 2016) shows an E (score 51), well below the UK norm with real room to improve. Earlier certificates rated it D (July 2013); the latest reading is one band lower. Between certificates, lighting went from Average to Good. The recommended improvements would lift it to B (score 87), a 3-band jump. The latest certificate is from June 2016, so improvements made since then won't be reflected.
It hasn't traded since October 2006, a hold of 20 years that's notably long for the area. Across 1996–2006, sale prices on this property compounded at 9.7% per year. Today's modelled estimate of £109,000 sits 101.9% above the 2006 sale of £54,000. On a £-per-square-foot basis, the last sale (£73/sq ft) was about 46.9% above the typical sold price in the postcode. At 69 m² it's 25% smaller than the typical home in the postcode (92 m² median across 23 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 87% of similar EPCs).
Know exactly what you're buying at 15 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
- Bathrooms1
Outside
- Private gardenRear
Building
- Heating systemGas
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 02 Jun 2026
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
More low energy lighting installed
Planning history
15 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 15 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
Sale price has at least doubled since 1996.
£109,000
Modelled from EPC, postcode comparables and a sale-price growth of 9.7% per year over 10 years.
£54,000
Growth on file: 9.7% per year over 10 years.
Sales timeline
10 October 2006Most recent
£54,000
+125.0%over 3 years1 May 2003
£24,000
+11.6%over 6 years1 November 1996
£21,500
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 15 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
15 Gwendoline Street is notably below the street on habitable rooms.
Price per m²
£783
Street avg £720
Floor Area
69 m²
Street avg 94 m²
Habitable Rooms
3 rooms
Street avg 5 rooms
CO₂ Emissions
5.5 t/year
Street avg 5.2 t/year
Similar properties nearby
1 Crichton Street, Treherbert
CF42 5RA
1 Coldra Road, Treherbert
CF42 5ST
1 David Street, Treherbert
CF42 5LB
1 Brynfedwen Close, Treherbert
CF42 5PB
1 Blaen Y Cwm Terrace, Treherbert
CF42 5ND
1 Brook Street, Blaenrhondda
CF42 5SG
1 Cwrt Yr Ysgol, Treherbert
CF42 5PX
1 Abertonllwyd Street, Treherbert
CF42 5PF
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.