11 Castleton Avenue, Treherbert, Treorchy, CF42 5SS
About 11 Castleton Avenue
11 Castleton Avenue is a semi-detached house in Treherbert, Treorchy, Treorchy (CF42 5SS). It has a recorded floor area of 139 m² (around 1496 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (August 2019) shows an E (score 41), well below the UK norm with real room to improve. When first surveyed in June 2013 the rating was F, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Good, hot-water efficiency went from Poor to Good and main heating went from Average to Good; while window efficiency dropped from Poor to Very Poor and lighting dropped from Average to Very Poor. The recommended improvements would lift it to C (score 76), a 2-band jump.
At 139 m² the property is well over the postcode median (100 m² across 22 EPCs), placing it in the larger end of the local stock.
Know exactly what you're buying at 11 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
11 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
Heating controls upgraded for better temperature management
Hot water system upgraded
Roof insulation improved
Low energy lighting percentage decreased
Planning history
11 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 11 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
11 Castleton Avenue has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£170,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
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 11 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
On co₂ emissions, 11 Castleton Avenue runs well behind the street norm.
EPC Rating
41 (E)
Street avg 61 (D)
Floor Area
139 m²
Street avg 108 m²
CO₂ Emissions
12.0 t/year
Street avg 6.0 t/year
Habitable Rooms
6 rooms
Street avg 5 rooms
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 David Street, Treherbert
CF42 5LB
1 Coldra Road, Treherbert
CF42 5ST
1 Crichton Street, Treherbert
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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.