23 Cae Lewis, Tongwynlais, Cardiff, CF15 7LQ
About 23 Cae Lewis
23 Cae Lewis is a one-bedroom semi-detached house in Tongwynlais, Cardiff, Cardiff (CF15 7LQ). It has a recorded floor area of 30 m² (around 323 sq ft), construction records dating it to 1950-1966 and council tax band B. At 30 m² this is the smallest unit on EPC record across the building (30–136 m²). The building's EPC ratings span F to C, with this unit at the top. The latest certificate (September 2025) shows a C (score 70). When first surveyed in March 2009 the rating was F, the property has climbed 3 bands since. Between certificates, wall efficiency went from Poor to Good, window efficiency went from Average to Good and lighting went from Average to Good. Main heating runs on electricity.
Untraded for 22 years, with the last transfer in August 2004. Today's modelled estimate of £123,000 sits 64% above the 2004 sale of £75,000. At 30 m² it sits well below the postcode median (62 m² across 14 EPCs), making it one of the more compact homes locally.
What this property has
Inside
- Bedrooms1
Energy performance
23 Cae Lewis's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
More low energy lighting installed
Heating system upgraded to a more efficient system
Hot water system changed
High performance glazing installed
Cavity wall insulation installed
Floor insulation added or improved
Get a survey for this property
Level 3 Building Survey
Because the property has no mains gas supply, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
23 Cae Lewis 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
£123,000
Modelled from EPC, postcode comparables.
£75,000
Recorded with HM Land Registry.
Sales timeline
4 August 2004Most recent
£75,000
Median price across the last 5 sales in CF15 7LQ: £237,500 (2024–2018).
Nearby sales in CF15 7LQ
19 Cae Lewis, Tongwynlais, Cardiff, CF15 7LQ
Sold Jun 2024
£330,0007 Cae Lewis, Tongwynlais, Cardiff, CF15 7LQ
Sold Apr 2022
£220,0004 Cae Lewis, Tongwynlais, Cardiff, CF15 7LQ
Sold Feb 2019
£167,00022 Cae Lewis, Tongwynlais, Cardiff, CF15 7LQ
Sold Jul 2017
£136,0002 Cae Lewis, Tongwynlais, Cardiff, CF15 7LQ
Sold May 2007
£160,000
Versus other Cae Lewis homes
On epc rating, 23 Cae Lewis runs well behind the street norm.
EPC Rating
70 (C)
Street avg 73 (C)
Floor Area
30 m²
Street avg 36 m²
CO₂ Emissions
0.5 t/year
Street avg 1.4 t/year
Habitable Rooms
3 rooms
Street avg 2 rooms
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Iron Bridge — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







