4 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
About 4 Castleton Avenue
4 Castleton Avenue is a semi-detached house in Treherbert, Treorchy, Treorchy (CF42 5SS). It has a recorded floor area of 126 m² (around 1356 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (September 2019) shows a C (score 69), just inside the C band. When first surveyed in June 2019 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good.
Held since October 2010 — that's 16 years off the open market, well above the local norm. At 126 m² it's 26.6% larger than the typical home in the postcode (100 m² median across 22 EPCs). Across 2000–2010, sale prices on this property compounded at 10.4% per year. Today's modelled estimate of £178,000 is 48.3% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£88/sq ft) was about 17.2% above the typical sold price in the postcode.
Know exactly what you're buying at 4 Castleton Avenue
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
4 Castleton Avenue's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Planning history
4 Castleton Avenue has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 4 Castleton Avenue
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
4 Castleton Avenue has more than doubled in price since the earliest registered sale in 2000.
£178,000
Modelled from EPC, postcode comparables and a sale-price growth of 10.4% per year over 10 years.
£120,000
Growth on file: 10.4% per year over 10 years.
Sales timeline
10 October 2010Most recent
£120,000
+166.7%over 9 years10 November 2000
£45,000
Median price across the last 5 sales in CF42 5SS: £130,000 (2025–2022).
Nearby sales in CF42 5SS
25 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
Sold Jul 2025
£130,00014 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
Sold Jul 2025
£185,000Fernhill House, Castleton Avenue, Treherbert, Treorchy, CF42 5SS
Sold Dec 2023
£395,0003 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
Sold Nov 2022
£130,00026 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
Sold Aug 2022
£125,000
Everything we know about 4 Castleton Avenue, 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 Castleton Avenue homes
Years Held for 4 Castleton Avenue runs comfortably ahead of the street norm.
Price per m²
£952
Street avg £1,007
Floor Area
126 m²
Street avg 109 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
6.4 t/year
Street avg 6.3 t/year
Similar properties nearby
1 Blaen Y Cwm Terrace, Treherbert
CF42 5ND
1 Clos Ioan, Treherbert
CF42 5AQ
1 Castleton Avenue, Treherbert
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1 Clyngwyn Road, Blaenrhondda
CF42 5SL
1 Brynfedwen Close, Treherbert
CF42 5PB
1 Blaenrhondda Road, Blaenrhondda
CF42 5SP
1 David Street, Treherbert
CF42 5LB
1 Coldra Road, Treherbert
CF42 5ST
The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Steps — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.