5 Allen Close, Old St Mellons, Cardiff, CF3 5DH
About 5 Allen Close
5 Allen Close is a four-bedroom detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 159 m² (around 1707 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (April 2011) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 74). The latest certificate is from April 2011, so improvements made since then won't be reflected.
At 159 m² the property is well over the postcode median (90 m² across 24 EPCs), placing it in the larger end of the local stock. Across 1996–2011, sale prices on this property compounded at 5% per year. Today's modelled estimate of £464,000 sits 66.3% above the 2011 sale of £278,950. On a £-per-square-foot basis, the last sale (£163/sq ft) was about 16.6% above the typical sold price in the postcode. 15 years since the last transfer (October 2011).
What this property has
Inside
- Bedrooms4
Energy performance
5 Allen Close'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This certificate is over 10 years old and is no longer valid.Expired 14 Apr 2021
EPC Rating
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Planning history
5 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.
£464,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.0% per year over 15 years.
£278,950
Growth on file: 5.0% per year over 15 years.
Sales timeline
20 October 2011Most recent
£278,950
+106.6%over 15 years13 October 1996
£135,000
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
Versus other Allen Close homes
Floor Area for 5 Allen Close runs comfortably ahead of the street norm.
Price per m²
£1,759
Street avg £2,343
Floor Area
159 m²
Street avg 97 m²
Habitable Rooms
8 rooms
Street avg 6 rooms
CO₂ Emissions
5.0 t/year
Street avg 3.6 t/year
Similar properties nearby
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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.







