18 Llwyn Mallt, Tongwynlais, Cardiff, CF15 7HW
About 18 Llwyn Mallt
18 Llwyn Mallt is a three-bedroom detached house in Tongwynlais, Cardiff, Cardiff (CF15 7HW). It has a recorded floor area of 112 m² (around 1206 sq ft), construction records dating it to 1991-1995 and council tax band E. The latest certificate (June 2016) shows an E (score 51), well below the UK norm with real room to improve. Earlier certificates rated it D (March 2014); the latest reading is one band lower. Between certificates, lighting dropped from Good to Very Poor. The recommended improvements would lift it to B (score 85), a 3-band jump. The latest certificate is from June 2016, so improvements made since then won't be reflected.
It hasn't traded since May 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs). Across 2000–2007, sale prices on this property compounded at 14.1% per year. Today's modelled estimate of £332,000 is 47.6% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£187/sq ft) was about 17.3% above the typical sold price in the postcode.
What this property has
Inside
- Bedrooms3
Energy performance
18 Llwyn Mallt's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 15 Jun 2026
EPC Rating
Get a survey for this property
Level 2 HomeBuyer Report
We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.
From £595 · Includes VAT
Planning history
18 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
18 Llwyn Mallt has more than doubled in price since the earliest registered sale in 2000.
£332,000
Modelled from EPC, postcode comparables and a sale-price growth of 14.1% per year over 7 years.
£224,950
Growth on file: 14.1% per year over 7 years.
Sales timeline
10 May 2007Most recent
£224,950
+142.8%over 6 years10 August 2000
£92,631
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
On habitable rooms, 18 Llwyn Mallt runs well behind the street norm.
Price per m²
£2,008
Street avg £2,235
Floor Area
112 m²
Street avg 116 m²
Habitable Rooms
5 rooms
Street avg 7 rooms
CO₂ Emissions
6.6 t/year
Street avg 4.9 t/year
Similar properties nearby
1 Bute Street, Tongwynlais
CF15 7LJ
1 Church Lane, Nantgarw
CF15 7TQ
1 Forest Cottage, Castle Road, Tongwynlais
CF15 7JR
1 Church Street, Taffs Well
CF15 7PG
1 Bute Villa, Taffs Well
CF15 7QP
1 Cwm Gwynlais, Tongwynlais
CF15 7HU
1 Castle Road, Tongwynlais
CF15 7JQ
1 Beechwood Road, Taffs Well
CF15 7RZ
The neighbourhood at a glance
Crime
2/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.







