25 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
About 25 Castleton Avenue
25 Castleton Avenue is a three-bedroom semi-detached house in Treherbert, Treorchy, Treorchy (CF42 5SS). It has a recorded floor area of 78 m² (around 840 sq ft), construction records dating it to 1996-2002 and council tax band B. The latest certificate (March 2025) shows a C (score 75), near the top of the C band. The rating has held steady at C across 2 certificates since July 2013. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 87).
Most recent transfer was July 2025 at £130,000 — fresh data. Across 2019–2025, sale prices on this property compounded at 6.9% per year. Today's modelled estimate of £163,000 is 25.4% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£155/sq ft) was about 137.7% above the typical sold price in the postcode. At 78 m² it's 24.6% smaller than the typical home in the postcode (104 m² median across 22 EPCs).
Know exactly what you're buying at 25 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
What this property has
Inside
- Bedrooms3
- Bathrooms1
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Loft insulation upgraded to recommended levels
More low energy lighting installed
Planning history
25 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 25 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
25 Castleton Avenue valuation sits well clear of the typical sold price in this postcode.
£163,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.9% per year over 6 years.
£130,000
Growth on file: 6.9% per year over 6 years.
Sales timeline
17 July 2025Most recent
£130,000
+51.2%over 6 years28 April 2019
£86,000
Median price across the last 5 sales in CF42 5SS: £130,000 (2025–2022).
Nearby sales in CF42 5SS
14 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
£125,00015 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
Sold Mar 2022
£72,000
Everything we know about 25 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
Price per m² for 25 Castleton Avenue runs comfortably ahead of the street norm.
Price per m²
£1,667
Street avg £948
Floor Area
78 m²
Street avg 111 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
3.0 t/year
Street avg 6.4 t/year
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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.