21 Llys Illtern, Capel Llanilltern, Cardiff, CF5 6GB
About 21 Llys Illtern
21 Llys Illtern is a semi-detached house in Capel Llanilltern, Cardiff, Cardiff (CF5 6GB). It has a recorded floor area of 59 m² (around 635 sq ft). The latest certificate (November 2020) returns a B (score 82), comfortably above the UK average. The recommended improvements would push it to A (score 96).
At 59 m² it sits well below the postcode median (112 m² across 46 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £253,000 is 26.5% above the 2020 sale price. Sold December 2020 for £200,000.
Energy performance
21 Llys Illtern's carbon output is low for the local stock.
EPC Rating
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Planning history
21 Llys Illtern has no planning applications on record.
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
£253,000
Modelled from EPC, postcode comparables.
£200,000
Recorded with HM Land Registry.
Sales timeline
14 December 2020Most recent
£200,000
Median price across the last 5 sales in CF5 6GB: £399,995 (2024–2023).
Nearby sales in CF5 6GB
57 Llys Illtern, Capel Llanilltern, Cardiff, CF5 6GB
Sold Feb 2024
£399,99555 Llys Illtern, Capel Llanilltern, Cardiff, CF5 6GB
Sold Dec 2023
£399,99553 Llys Illtern, Capel Llanilltern, Cardiff, CF5 6GB
Sold Dec 2023
£414,99563 Llys Illtern, Capel Llanilltern, Cardiff, CF5 6GB
Sold Nov 2023
£399,99559 Llys Illtern, Capel Llanilltern, Cardiff, CF5 6GB
Sold Nov 2023
£399,995
Versus other Llys Illtern homes
On years held, 21 Llys Illtern stands well clear of the street.
Price per m²
£3,390
Street avg £3,433
Floor Area
59 m²
Street avg 121 m²
CO₂ Emissions
1.1 t/year
Street avg 1.7 t/year
Years Held
5 years
Street avg 4 years
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The neighbourhood at a glance
Crime
6/mo
Steady year-on-year across the wider district.
Nearest stop
0.4 km
Heol St y Nyll — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







