9 Allen Close, Old St Mellons, Cardiff, CF3 5DH
About 9 Allen Close
9 Allen Close is a four-bedroom property in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has council tax band F.
Held since September 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Across 1996–2009, sale prices on this property compounded at 6% per year.
What this property has
Inside
- Bedrooms4
Energy performance
No EPC on record
This property doesn't have an Energy Performance Certificate yet. An EPC is required to sell or let — and unlocks our automated valuation.
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Planning history
9 Allen Close has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
Sale price has at least doubled since 1996.
£260,000
Growth on file: 6.0% per year over 13 years.
Sales timeline
3 September 2009Most recent
£260,000
+109.7%over 12 years18 December 1996
£124,000
Median price across the last 5 sales in CF3 5DH: £258,000 (2025–2020).
Nearby sales in CF3 5DH
31 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold Jun 2025
£418,5003 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold Aug 2024
£480,00020 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold Apr 2024
£195,00038 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold Apr 2022
£258,00037 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold Dec 2020
£248,000
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
3/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Llaneirwg Way — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







