38 Allen Close, Old St Mellons, Cardiff, CF3 5DH
About 38 Allen Close
38 Allen Close is a three-bedroom semi-detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1996-2002 and council tax band D. The latest certificate (January 2022) shows a C (score 74). When first surveyed in February 2012 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Very Good. The recommended improvements would push it to B (score 87).
Across 1997–2022, sale prices on this property compounded at 5.7% per year. On a £-per-square-foot basis, the last sale (£324/sq ft) was about 133.6% above the typical sold price in the postcode. At 74 m² it's 24.9% smaller than the typical home in the postcode (99 m² median across 24 EPCs). Last sale on file: £258,000 in April 2022. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Dining roomYes
- CloakroomYes
- EnsuiteYes
Outside
- Private gardenFront and rear
- GarageYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Loft insulation upgraded to recommended levels
More low energy lighting installed
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Planning history
38 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 grown by over 3x since 1997.
£275,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.7% per year over 25 years.
£258,000
Growth on file: 5.7% per year over 25 years.
Sales timeline
7 April 2022Most recent
£258,000
+79.5%over 9 years19 April 2012
£143,750
+121.2%over 14 years29 May 1997
£65,000
Median price across the last 5 sales in CF3 5DH: £248,000 (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
£195,00037 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold Dec 2020
£248,00042 Allen Close, Old St Mellons, Cardiff, CF3 5DH
Sold May 2020
£207,500
Versus other Allen Close homes
EPC Rating for 38 Allen Close runs comfortably ahead of the street norm.
Price per m²
£3,486
Street avg £2,271
Floor Area
74 m²
Street avg 100 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
2.2 t/year
Street avg 3.7 t/year
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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.







