91 Gwendoline Street, Treherbert, Treorchy, CF42 5BP
About 91 Gwendoline Street
91 Gwendoline Street is a mid-terrace house in Treherbert, Treorchy, Treorchy (CF42 5BP). It has a recorded floor area of 103 m² (around 1109 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (February 2017) shows an E (score 42), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 77), a 2-band jump.
At 103 m² the property is well over the postcode median (79 m² across 22 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs). Across 1996–2023, sale prices on this property compounded at 10.4% per year. Today's modelled estimate of £129,000 sits 51.8% above the 2023 sale of £85,000. On a £-per-square-foot basis, the last sale (£77/sq ft) was about 43.1% above the typical sold price in the postcode. Last sale on file: £85,000 in August 2023.
Know exactly what you're buying at 91 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
Energy performance
91 Gwendoline Street's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Planning history
91 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 91 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
91 Gwendoline Street has more than quadrupled in price since its earliest registered sale in 1996.
£129,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.4% per year over 27 years.
£85,000
Growth on file: 10.4% per year over 27 years.
Sales timeline
13 August 2023Most recent
£85,000
+37.1%over 18 years23 June 2005
£62,000
+933.3%over 8 years8 November 1996
£6,000
Median price across the last 5 sales in CF42 5BP: £76,000 (2025–2023).
Nearby sales in CF42 5BP
68 Gwendoline Street, Treherbert, Treorchy, CF42 5BP
Sold May 2025
£86,50089 Gwendoline Street, Treherbert, Treorchy, CF42 5BP
Sold Oct 2023
£53,00085 Gwendoline Street, Treherbert, Treorchy, CF42 5BP
Sold Aug 2023
£79,99582 Gwendoline Street, Treherbert, Treorchy, CF42 5BP
Sold Feb 2023
£65,00079 Gwendoline Street, Treherbert, Treorchy, CF42 5BP
Sold Feb 2023
£76,000
Everything we know about 91 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 co₂ emissions, 91 Gwendoline Street runs well behind the street norm.
Price per m²
£825
Street avg £698
Floor Area
103 m²
Street avg 84 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
9.7 t/year
Street avg 5.2 t/year
Similar properties nearby
1 Charles Street, Treherbert
CF42 5HF
1 Bute Street, Treherbert
CF42 5NP
1 Cwmsaerbren Street, Treherbert
CF42 5HY
1 Collins Close, Treherbert
CF42 5NH
1 Delwyn Terrace, Blaencwm
CF42 5ED
1 Ael Y Bryn, Treherbert
CF42 5HD
1 Alma Street, Treherbert
CF42 5LY
1 Baglan Street, Treherbert
CF42 5AA
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
Gwendoline Street — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.