14 Allen Close, Old St Mellons, Cardiff, CF3 5DH
About 14 Allen Close
14 Allen Close is a three-bedroom semi-detached house in Old St. Mellons, Cardiff, Cardiff (CF3 5DH). It has a recorded floor area of 70 m² (around 753 sq ft), construction records dating it to 1996-2002 and council tax band E. The latest certificate (October 2012) shows a C (score 71). The recommended improvements would push it to B (score 89). The latest certificate is from October 2012, so improvements made since then won't be reflected. Other recorded features include a conservatory.
Across 1997–2013, sale prices on this property compounded at 4.7% per year. Today's modelled estimate of £255,000 sits 71.1% above the 2013 sale of £149,000. On a £-per-square-foot basis, the last sale (£198/sq ft) was about 41.1% above the typical sold price in the postcode. One planning record on file: an extension approved in 2017. Past consents include an extension, meaningful when judging how the property has evolved. Last changed hands 13 years ago, in February 2013. At 70 m² it's 28.9% smaller than the typical home in the postcode (99 m² median across 24 EPCs).
What this property has
Inside
- Bedrooms3
- EnsuiteYes
- ConservatoryYes
Outside
- Private gardenRear
- DrivewayYes
Building
- Central heatingYes
- RefurbishedYes
Energy performance
14 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This certificate is over 10 years old and is no longer valid.Expired 14 Oct 2022
EPC Rating
Certificate validity
Expired on 14 October 2022
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Planning history
14 Allen Close has an approved extension on the planning record.
1 application on record at 14 Allen Close, Old St Mellons, Cardiff, CF3 5DH
- Apr 2017ExtensionOutlineOutcome in report
NEW SINGLE STOREY EXTENSION TO EXISTING DWELLING
- Documents
- 6 docs on file
- Reference
- 17/00524/DCH
Unlock 14 Allen Close, Old St Mellons, Cardiff, CF3 5DH's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full
- The 6 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
Sale price has at least doubled since 1997.
£255,000
Modelled from EPC, postcode comparables and a sale-price growth of 4.7% per year over 15 years.
£149,000
Growth on file: 4.7% per year over 15 years.
Sales timeline
28 February 2013Most recent
£149,000
+101.6%over 15 years22 December 1997
£73,900
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
On floor area, 14 Allen Close runs well behind the street norm.
Price per m²
£2,129
Street avg £2,328
Floor Area
70 m²
Street avg 100 m²
Habitable Rooms
5 rooms
Street avg 6 rooms
CO₂ Emissions
2.3 t/year
Street avg 3.7 t/year
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The neighbourhood at a glance
Crime
242/mo
Falling 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.







