183a, Ynyswen Road, Treorchy, CF42 6EG
About 183a
183a is a mid-terrace house in Treorchy (CF42 6EG). It has a recorded floor area of 50 m² (around 538 sq ft) and construction records dating it to 1900-1929. The latest certificate (July 2016) shows a D (score 65), on the cusp of jumping into the C band. When first surveyed in August 2010 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Poor to Average, hot-water efficiency went from Average to Good and main heating went from Average to Good; while lighting dropped from Very Good to Good. The recommended improvements would push it to C (score 74). At 50 m² this is the 2nd smallest of 33 units on EPC record in the building, where floor areas span 32–154 m². The building's EPC ratings span E to B across 33 units on file.
At 50 m² it sits well below the postcode median (91 m² across 32 EPCs), making it one of the more compact homes locally.
Know exactly what you're buying at 183a
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 upgraded for better temperature management
Hot water efficiency improved
Windows upgraded, improving insulation
Low energy lighting percentage decreased
Planning history
183a has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
183a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£133,000
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 6EG: £130,700 (2025–2022).
Nearby sales in CF42 6EG
Everything we know about 183a, 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?

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
0.2 km
Dunraven Terrace — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.