12 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
About 12 Clos Alyn
12 Clos Alyn is a mid-terrace house in Pontprennau, Cardiff, Cardiff (CF23 8LB). It has a recorded floor area of 55 m² (around 592 sq ft), construction records dating it to 1991-1995 and council tax band D. The latest certificate (January 2016) shows a D (score 64), on the cusp of jumping into the C band. Earlier certificates rated it C (May 2012); the latest reading is one band lower. Between certificates, lighting went from Poor to Good; while roof efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 87), a 2-band jump. The latest certificate is from January 2016, so improvements made since then won't be reflected.
At 55 m² it sits well below the postcode median (90 m² across 20 EPCs), making it one of the more compact homes locally.
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 18 Jan 2026
EPC Rating
Property Improvements
Changes detected from historical EPC data
More low energy lighting installed
Mechanical ventilation installed
Cavity wall insulation installed
Ventilation system changed
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Planning history
12 Clos Alyn 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
12 Clos Alyn has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£216,000
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 CF23 8LB: £220,000 (2025–2019).
Nearby sales in CF23 8LB
21 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
Sold Sept 2025
£334,0003 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
Sold Jun 2023
£270,00033 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
Sold May 2022
£215,00023 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
Sold May 2021
£181,5005 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
Sold Nov 2019
£220,000
Versus other Clos Alyn homes
Habitable Rooms for 12 Clos Alyn lags the street by a wide margin.
EPC Rating
64 (D)
Street avg 68 (D)
Floor Area
55 m²
Street avg 81 m²
CO₂ Emissions
2.6 t/year
Street avg 3.1 t/year
Habitable Rooms
3 rooms
Street avg 5 rooms
Similar properties nearby
1 Almond Drive, Pontprennau
CF23 8HD
1 Clos Nant Ddu, Pontprennau
CF23 8LF
1 Claverton Way, Pontprennau
CF23 8RR
1 Butterfield Drive, Pontprennau
CF23 8NE
1 Amber Close, Pontprennau
CF23 8AW
1 Amblecote Close, Pontprennau
CF23 8BY
1 Charnwood Drive, Pontprennau
CF23 8NN
1 Amberwood Close, Pontprennau
CF23 8BZ
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Sindercombe Cl — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







