9 Clos Alyn, Pontprennau, Cardiff, CF23 8LB
About 9 Clos Alyn
9 Clos Alyn is a detached house in Pontprennau, Cardiff, Cardiff (CF23 8LB). It has a recorded floor area of 99 m² (around 1062 sq ft), construction records dating it to 1983-1990 and council tax band E. The latest certificate (July 2011) shows a D (score 58), a step below the typical UK home. The latest certificate is from July 2011, so improvements made since then won't be reflected.
Held since September 1998 — that's 28 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £338,000 sits 339% above the 1998 sale of £77,000. On a £-per-square-foot basis, the last sale (£72/sq ft) was about 63.7% below the postcode norm.
Energy performance
9 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This certificate is over 10 years old and is no longer valid.Expired 06 Jul 2021
EPC Rating
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Planning history
9 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
9 Clos Alyn's modelled value sits at over four times its earliest registered sale price (1998).
£338,000
Modelled from EPC, postcode comparables.
£77,000
Recorded with HM Land Registry.
Sales timeline
29 September 1998Most recent
£77,000
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
On price per m², 9 Clos Alyn runs well behind the street norm.
Price per m²
£780
Street avg £2,764
Floor Area
99 m²
Street avg 79 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
4.7 t/year
Street avg 2.9 t/year
Similar properties nearby
1 Clos Alyn, Pontprennau
CF23 8LB
1 Clos Dol Heulog, Pontprennau
CF23 8AT
1 Amberwood Close, Pontprennau
CF23 8BZ
1 Blackberry Way, Pontprennau
CF23 8FE
1 Charnwood Drive, Pontprennau
CF23 8NN
1 Ambergate Drive, Pontprennau
CF23 8AX
1 Amblecote Close, Pontprennau
CF23 8BY
1 Clos Nant Mwlan, Pontprennau
CF23 8NA
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.







