121 Penarth Road, Cardiff, CF11 6JU
About 121 Penarth Road
121 Penarth Road is a mid-terrace house in Cardiff (CF11 6JU). It has a recorded floor area of 41 m² (around 441 sq ft) and construction records dating it to before 1900. At 41 m² this is the 4th smallest of 20 units on EPC record in the building, where floor areas span 31–147 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (November 2018) shows an E (score 49), well below the UK norm with real room to improve. Earlier certificates rated it D (May 2013); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Very Good; while hot-water efficiency dropped from Good to Very Poor and lighting dropped from Good to Very Poor. The recommended improvements would push it to D (score 60). Main heating runs on electricity.
At 41 m² it sits well below the postcode median (69 m² across 19 EPCs), making it one of the more compact homes locally. One historical planning record sits against the property in 2014.
Energy performance
EPC Rating
Certificate validity
Valid until 6 November 2028
Property Improvements
Changes detected from historical EPC data
Heating system changed
Changed to a more efficient fuel source
Heating controls changed
Hot water system changed
More low energy lighting installed
Cavity wall insulation installed
Low energy lighting percentage decreased
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
1 application on record at 121 Penarth Road, Cardiff, CF11 6JU
- Aug 2014ConversionFullOutcome in report
RETENTION OF CONVERSION FROM 2 TO 3 FLATS
- Documents
- 7 docs on file
- Reference
- 14/01632/DCI
Unlock 121 Penarth Road, Cardiff, CF11 6JU's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 10 notable nearby
- The 7 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
121 Penarth Road has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£136,000
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 CF11 6JU: £186,000 (2023–2020).
Nearby sales in CF11 6JU
Versus other Penarth Road homes
EPC Rating for 121 Penarth Road lags the street by a wide margin.
EPC Rating
49 (E)
Street avg 61 (D)
Floor Area
41 m²
Street avg 54 m²
CO₂ Emissions
2.6 t/year
Street avg 2.6 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
362/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Blaenclydach Street — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







