21 Blaenrhondda Road, Blaenrhondda, Treorchy, CF42 5SP
About 21 Blaenrhondda Road
21 Blaenrhondda Road is a semi-detached house in Blaenrhondda, Treorchy, Treorchy (CF42 5SP). It has a recorded floor area of 86 m² (around 926 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (January 2014) shows a C (score 73). When first surveyed in March 2011 the rating was G, the property has climbed 4 bands since. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Very Poor to Good and window efficiency went from Average to Good. The recommended improvements would push it to B (score 84). The latest certificate is from January 2014, so improvements made since then won't be reflected.
Across 2013–2019, sale prices on this property compounded at 19.5% per year. Today's modelled estimate of £130,000 is 34.7% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£104/sq ft) was about 43.7% above the typical sold price in the postcode. Most recent transfer: September 2019 at £96,500.
Know exactly what you're buying at 21 Blaenrhondda Road
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
21 Blaenrhondda Road's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 29 Jan 2024
EPC Rating
Property Improvements
Changes detected from historical EPC data
Replaced storage heaters with gas boiler
Connected to mains gas supply
Heating controls upgraded for better temperature management
Hot water system upgraded
Windows upgraded, improving insulation
Wall insulation improved
Loft insulation installed or upgraded to 250mm+
Floor insulation added or improved
More low energy lighting installed
Planning history
21 Blaenrhondda Road has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 21 Blaenrhondda Road
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
21 Blaenrhondda Road has more than tripled in price since its earliest registered sale in 2013.
£130,000
Modelled from EPC, postcode comparables and a sale-price growth of 19.5% per year over 6 years.
£96,500
Growth on file: 19.5% per year over 6 years.
Sales timeline
5 September 2019Most recent
£96,500
+201.6%over 6 years27 June 2013
£32,000
Median price across the last 5 sales in CF42 5SP: £115,000 (2025–2023).
Nearby sales in CF42 5SP
12 Blaenrhondda Road, Blaenrhondda, Treorchy, CF42 5SP
Sold Mar 2025
£270,0007 Blaenrhondda Road, Blaenrhondda, Treorchy, CF42 5SP
Sold Nov 2024
£115,00031 Blaenrhondda Road, Blaenrhondda, Treorchy, CF42 5SP
Sold May 2024
£108,00011 Blaenrhondda Road, Blaenrhondda, Treorchy, CF42 5SP
Sold Apr 2024
£80,00036 Blaenrhondda Road, Blaenrhondda, Treorchy, CF42 5SP
Sold May 2023
£205,000
Everything we know about 21 Blaenrhondda Road, 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 Blaenrhondda Road homes
On co₂ emissions, 21 Blaenrhondda Road stands well clear of the street.
Price per m²
£1,122
Street avg £1,017
Floor Area
86 m²
Street avg 98 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
2.5 t/year
Street avg 5.1 t/year
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The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Clyngwyn Road — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.