17 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
About 17 Llwyn Mallt
17 Llwyn Mallt is a four-bedroom detached house in Tongwynlais, Cardiff, Cardiff (CF15 7HW). It has a recorded floor area of 113 m² (around 1216 sq ft), construction records dating it to 1983-1990 and council tax band F. The latest certificate (August 2013) shows a C (score 71). When first surveyed in August 2012 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Very Good and lighting went from Average to Good. The recommended improvements would push it to B (score 83). The latest certificate is from August 2013, so improvements made since then won't be reflected. Other recorded features include a conservatory. The home occupies a cul-de-sac position.
It hasn't traded since March 2003, a hold of 23 years that's notably long for the area. Today's modelled estimate of £376,000 sits 124.5% above the 2003 sale of £167,500. Its energy rating outperforms most of the postcode (better than 75% of similar EPCs).
What this property has
Inside
- Bedrooms4
- Dining roomYes
- EnsuiteYes
- ConservatoryYes
Outside
- GarageYes
- Cul-de-sacYes
Energy performance
17 Llwyn Mallt'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This certificate is over 10 years old and is no longer valid.Expired 08 Aug 2023
EPC Rating
Certificate validity
Expired on 8 August 2023
Property Improvements
Changes detected from historical EPC data
Loft insulation upgraded to recommended levels
More low energy lighting installed
Get a survey for this property
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Planning history
17 Llwyn Mallt 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
17 Llwyn Mallt valuation sits well clear of the typical sold price in this postcode.
£376,000
Modelled from EPC, postcode comparables.
£167,500
Recorded with HM Land Registry.
Sales timeline
7 March 2003Most recent
£167,500
Median price across the last 5 sales in CF15 7HW: £322,000 (2022–2018).
Nearby sales in CF15 7HW
20 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
Sold Dec 2022
£405,0001 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
Sold Dec 2021
£352,9959 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
Sold Mar 2021
£322,00014 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
Sold Nov 2019
£300,00016 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
Sold Mar 2015
£269,950
Versus other Llwyn Mallt homes
EPC Rating for 17 Llwyn Mallt runs comfortably ahead of the street norm.
Price per m²
£1,482
Street avg £2,288
Floor Area
113 m²
Street avg 116 m²
Habitable Rooms
6 rooms
Street avg 7 rooms
CO₂ Emissions
3.4 t/year
Street avg 5.1 t/year
Similar properties nearby
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1 Cwm Gwynlais, Tongwynlais
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1 Beechwood Road, Taffs Well
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1 Forest Cottage, Castle Road, Tongwynlais
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1 Birch Hill, Tongwynlais
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The neighbourhood at a glance
Crime
85/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Cwm Gwynlais — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







