11 Castle Street, Treorchy, CF42 6UY
About 11 Castle Street
11 Castle Street is a mid-terrace house in Treorchy (CF42 6UY). It has a recorded floor area of 60 m² (around 646 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (October 2022) shows a C (score 70). When first surveyed in November 2021 the rating was D, the property has climbed 1 band since. The recommended improvements would push it to B (score 90).
Today's modelled estimate of £120,000 sits 84.6% above the 2022 sale of £65,000. On a £-per-square-foot basis, the last sale (£101/sq ft) was about 57.1% above the typical sold price in the postcode. At 60 m² it's 18.9% smaller than the typical home in the postcode (74 m² median across 22 EPCs). Its energy rating outperforms most of the postcode (better than 77% of similar EPCs). Most recent transfer: May 2022 at £65,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 11 Castle Street
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Loft insulation upgraded to recommended levels
Planning history
11 Castle Street has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£120,000
Modelled from EPC, postcode comparables.
£65,000
Recorded with HM Land Registry.
Sales timeline
26 May 2022Most recent
£65,000
Median price across the last 5 sales in CF42 6UY: £73,000 (2024–2021).
Nearby sales in CF42 6UY
Everything we know about 11 Castle Street, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

Versus other Castle Street homes
11 Castle Street is notably below the street on floor area.
Price per m²
£1,083
Street avg £778
Floor Area
60 m²
Street avg 84 m²
Habitable Rooms
3 rooms
Street avg 5 rooms
CO₂ Emissions
3.0 t/year
Street avg 4.7 t/year
Similar properties nearby
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
Sunnybank Terrace — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.