10 Llewellyn Street, Blaencwm, Treorchy, CF42 5DS
About 10 Llewellyn Street
10 Llewellyn Street is a semi-detached house in Blaencwm, Treorchy, Treorchy (CF42 5DS). It has a recorded floor area of 98 m² (around 1055 sq ft), construction records dating it to before 1900 and council tax band A. The latest certificate (August 2019) shows an E (score 41), well below the UK norm with real room to improve. The rating has held steady at E across 4 certificates since April 2015. Between certificates, lighting went from Good to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 82), a 3-band jump.
At 98 m² the property is well over the postcode median (73 m² across 7 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 86% of similar EPCs).
Know exactly what you're buying at 10 Llewellyn Street
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
10 Llewellyn Street'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 changed
Loft insulation installed or upgraded to 250mm+
Heating controls upgraded for better temperature management
Low energy lighting percentage decreased
Heating controls upgraded for better temperature management
More low energy lighting installed
Planning history
10 Llewellyn Street has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 10 Llewellyn Street
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
10 Llewellyn Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£128,000
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 5DS: £57,000 (2020–2010).
Everything we know about 10 Llewellyn Street, 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 Llewellyn Street homes
On epc rating, 10 Llewellyn Street runs well behind the street norm.
EPC Rating
41 (E)
Street avg 67 (D)
Floor Area
98 m²
Street avg 80 m²
CO₂ Emissions
9.9 t/year
Street avg 4.4 t/year
Habitable Rooms
5 rooms
Street avg 4 rooms
Similar properties nearby
1 Bute Street, Treherbert
CF42 5NP
1 Collins Close, Treherbert
CF42 5NH
1 Delwyn Terrace, Blaencwm
CF42 5ED
1 Charles Street, Treherbert
CF42 5HF
1 Cwmsaerbren Street, Treherbert
CF42 5HY
1 Alma Street, Treherbert
CF42 5LY
1 Baglan Street, Treherbert
CF42 5AA
1 Ael Y Bryn, Treherbert
CF42 5HD
The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Hendrewen Hotel — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.