20 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
About 20 Heol Y Dderwen
20 Heol Y Dderwen is a three-bedroom semi-detached house in Nantgarw, Cardiff, Cardiff (CF15 7UJ). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1950-1966 and council tax band C. The latest certificate (September 2012) shows a D (score 63), on the cusp of jumping into the C band. The recommended improvements would lift it to B (score 83), a 2-band jump. The latest certificate is from September 2012, so improvements made since then won't be reflected.
Across 2005–2016, sale prices on this property compounded at 1.8% per year. Today's modelled estimate of £244,000 sits 65.4% above the 2016 sale of £147,500. On a £-per-square-foot basis, the last sale (£156/sq ft) was about 17.5% above the typical sold price in the postcode. 10 years since the last transfer (March 2016). 2 planning records sit against the property, 0 approved, 2 refused.
What this property has
Inside
- Bedrooms3
- Bathrooms1
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 05 Sept 2022
EPC Rating
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Planning history
A recent planning application at 20 Heol Y Dderwen was refused — worth checking the council file.
2 applications on record at 20 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
- Feb 2024RenovationFullOutcome in report
Proposed fencing to front garden and parking for one car (retrospective).
Retrospective- Documents
- 6 docs on file
- Reference
- 23/1412/10
- More recent applications — locked
- RenovationFeb 2024Decision
Unlock 20 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ's full planning history
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- Every decision — granted, refused or withdrawn (2 on record)
- All 2 applications on this property in full, plus 1 notable nearby
- The 12 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
20 Heol Y Dderwen valuation sits well clear of the typical sold price in this postcode.
£244,000
Modelled from EPC, postcode comparables and a sale-price growth of 1.8% per year over 11 years.
£147,500
Growth on file: 1.8% per year over 11 years.
Sales timeline
31 March 2016Most recent
£147,500
+21.9%over 11 years18 March 2005
£121,000
Median price across the last 5 sales in CF15 7UJ: £150,000 (2023–2015).
Nearby sales in CF15 7UJ
4 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
Sold Jul 2023
£127,0005 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
Sold Feb 2022
£168,00027 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
Sold Aug 2016
£155,00019 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
Sold Mar 2015
£150,0008 Heol Y Dderwen, Nantgarw, Cardiff, CF15 7UJ
Sold Apr 2011
£140,000
Versus other Heol Y Dderwen homes
Floor Area for 20 Heol Y Dderwen lags the street by a wide margin.
Price per m²
£1,676
Street avg £1,504
Floor Area
88 m²
Street avg 94 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.7 t/year
Street avg 3.9 t/year
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Heol-y-Dderwen — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







