4 John Street, Treherbert, Treorchy, CF42 5HH
About 4 John Street
4 John Street is a two-bedroom end-of-terrace house in Treherbert, Treorchy, Treorchy (CF42 5HH). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (April 2018) shows an E (score 51), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 87), a 3-band jump.
It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Across 2018–2021, sale prices on this property compounded at 30.9% per year. Today's modelled estimate of £113,000 is 32.9% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£125/sq ft) was about 79% above the typical sold price in the postcode. Sold September 2021 for £85,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 4 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
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
4 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 4 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
Sale price has at least doubled since 2018.
£113,000
Modelled from EPC, postcode comparables and a sale-price growth of 30.9% per year over 3 years.
£85,000
Growth on file: 30.9% per year over 3 years.
Sales timeline
23 September 2021Most recent
£85,000
+129.7%over 3 years23 August 2018
£37,000
Median price across the last 5 sales in CF42 5HH: £70,000 (2023–2017).
Nearby sales in CF42 5HH
2 John Street, Treherbert, Treorchy, CF42 5HH
Sold Jun 2023
£82,0008 John Street, Treherbert, Treorchy, CF42 5HH
Sold Jan 2023
£97,0007 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 4 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
EPC Rating for 4 John Street lags the street by a wide margin.
Price per m²
£1,349
Street avg £1,009
Floor Area
63 m²
Street avg 66 m²
Habitable Rooms
3 rooms
Street avg 4 rooms
CO₂ Emissions
5.2 t/year
Street avg 4.5 t/year
Similar properties nearby
1 Brook Street, Blaenrhondda
CF42 5SG
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 Abertonllwyd Street, Treherbert
CF42 5PF
1 Blaen Y Cwm Road, Blaencwm
CF42 5DG
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.