8 John Street, Treherbert, Treorchy, CF42 5HH
About 8 John Street
8 John Street is a two-bedroom end-of-terrace house in Treherbert, Treorchy, Treorchy (CF42 5HH). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (June 2021) shows an E (score 53), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since November 2009. Between certificates, lighting went from Very Poor to Good. The recommended improvements would lift it to B (score 86), a 3-band jump. Our model identifies extension potential, subject to local planning policy.
At 54 m² it's 21.7% smaller than the typical home in the postcode (69 m² median across 7 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Across 2010–2023, sale prices on this property compounded at 5.4% per year. Today's modelled estimate of £112,000 is 15.5% above the 2023 sale price. On a £-per-square-foot basis, the last sale (£167/sq ft) was about 152.5% above the typical sold price in the postcode. Last sale on file: £97,000 in January 2023.
Know exactly what you're buying at 8 John 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
- Bedrooms2
- Bathrooms1
Building
- RefurbishedYes
- Extension potentialPossible
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Planning history
8 John Street has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 8 John 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
Latest sale on 8 John Street was the highest on Land Registry record across the postcode.
£112,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.4% per year over 13 years.
£97,000
Growth on file: 5.4% per year over 13 years.
Sales timeline
20 January 2023Most recent
£97,000
+76.4%over 7 years11 August 2015
£55,000
+10.0%over 5 years21 June 2010
£50,000
Median price across the last 5 sales in CF42 5HH: £70,000 (2023–2018).
Nearby sales in CF42 5HH
2 John Street, Treherbert, Treorchy, CF42 5HH
Sold Jun 2023
£82,0004 John Street, Treherbert, Treorchy, CF42 5HH
Sold Sept 2021
£85,0007 John Street, Treherbert, Treorchy, CF42 5HH
Sold Jun 2018
£70,0001 John Street, Treherbert, Treorchy, CF42 5HH
Sold Feb 2011
£43,000Brockwell, John Street, Treherbert, Treorchy, CF42 5HH
Sold Feb 2003
£72,000
Everything we know about 8 John 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 John Street homes
Price per m² for 8 John Street runs comfortably ahead of the street norm.
Price per m²
£1,796
Street avg £920
Floor Area
54 m²
Street avg 68 m²
Habitable Rooms
3 rooms
Street avg 4 rooms
CO₂ Emissions
4.3 t/year
Street avg 4.7 t/year
Similar properties nearby
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1 Brynfedwen Close, Treherbert
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1 Blaen Y Cwm Terrace, 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
New Inn — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.