1 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
About 1 Clos Alyn
1 Clos Alyn is a three-bedroom detached house in Pontprennau, Cardiff, Cardiff (CF23 8LB). It has a recorded floor area of 91 m² (around 980 sq ft), construction records dating it to 1991-1995 and council tax band E. The latest certificate (March 2014) shows a C (score 69), just inside the C band. The recommended improvements would push it to B (score 84). The latest certificate is from March 2014, so improvements made since then won't be reflected.
Across 2003–2014, sale prices on this property compounded at 4% per year. Today's modelled estimate of £339,000 sits 50.7% above the 2014 sale of £225,000. On a £-per-square-foot basis, the last sale (£230/sq ft) was about 17.4% above the typical sold price in the postcode. 12 years since the last transfer (June 2014).
What this property has
Inside
- Bedrooms3
Energy performance
1 Clos Alyn'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This certificate is over 10 years old and is no longer valid.Expired 05 Mar 2024
EPC Rating
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Planning history
1 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
1 Clos Alyn valuation sits well clear of the typical sold price in this postcode.
£339,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.0% per year over 11 years.
£225,000
Growth on file: 4.0% per year over 11 years.
Sales timeline
23 June 2014Most recent
£225,000
+53.6%over 10 years10 July 2003
£146,500
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
1 Clos Alyn outperforms the street on years held by a wide margin.
Price per m²
£2,473
Street avg £2,659
Floor Area
91 m²
Street avg 79 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
3.0 t/year
Street avg 3.0 t/year
Similar properties nearby
1 Clos Dol Heulog, Pontprennau
CF23 8AT
1 Amberwood Close, Pontprennau
CF23 8BZ
1 Amblecote Close, Pontprennau
CF23 8BY
1 Amber Close, Pontprennau
CF23 8AW
1 Butterfield Drive, Pontprennau
CF23 8NE
1 Blackberry Way, Pontprennau
CF23 8FE
1 Clos Nant Mwlan, Pontprennau
CF23 8NA
1 Allt Y Wennol, Pontprennau
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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.







