37 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF
About 37 Merthyr Road
37 Merthyr Road is a mid-terrace house in Tongwynlais, Cardiff, Cardiff (CF15 7LF). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to before 1900 and council tax band D. The latest certificate (October 2023) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to B (score 84), a 3-band jump.
On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. A recent sale: £180,500 in April 2026. Today's modelled estimate of £259,000 is 43.5% above the 2026 sale price.
Energy performance
37 Merthyr Road sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Certificate validity
Valid until 9 October 2033
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
37 Merthyr Road 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
37 Merthyr Road valuation sits well clear of the typical sold price in this postcode.
£259,000
Modelled from EPC, postcode comparables.
£180,500
Recorded with HM Land Registry.
Sales timeline
1 April 2026Most recent
£180,500
Median price across the last 5 sales in CF15 7LF: £237,500 (2026–2017).
Nearby sales in CF15 7LF
3 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF
Sold Apr 2026
£462,50045 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF
Sold Apr 2024
£220,00039 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF
Sold May 2023
£237,50043 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF
Sold Nov 2022
£310,00023 Merthyr Road, Tongwynlais, Cardiff, CF15 7LF
Sold Dec 2017
£180,000
Versus other Merthyr Road homes
EPC Rating for 37 Merthyr Road lags the street by a wide margin.
Price per m²
£1,962
Street avg £2,158
Floor Area
92 m²
Street avg 108 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
5.4 t/year
Street avg 4.6 t/year
Similar properties nearby
1 Abbey Close, Taffs Well
CF15 7RS
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CF15 7LA
1 Beechwood Road, Taffs Well
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1 Castle Road, Tongwynlais
CF15 7JQ
1 Chapel Cottage, Tabor Street, Taffs Well
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1 Church Lane, Nantgarw
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1 Anchor Street, Taffs Well
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1 Bute Street, Tongwynlais
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The neighbourhood at a glance
Crime
85/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
St Michael`s Close — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







