11 Tai Dyffryn, Nantgarw, Cardiff, CF15 7TS
About 11 Tai Dyffryn
11 Tai Dyffryn is a five-bedroom detached house in Nantgarw, Cardiff, Cardiff (CF15 7TS). It has a recorded floor area of 212 m² (around 2282 sq ft), construction records dating it to 1996-2002 and council tax band G. The latest certificate (July 2020) shows a C (score 71). The rating has held steady at C across 2 certificates since September 2013. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 82).
Across 1997–2021, sale prices on this property compounded at 12% per year. Today's modelled estimate of £619,000 is 31.7% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£206/sq ft) was about 28.5% above the typical sold price in the postcode. Sold June 2021 for £470,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
What this property has
Inside
- Bedrooms5
- Bathrooms2
- EnsuiteYes
Outside
- GarageYes
Building
- RefurbishedYes
Energy performance
11 Tai Dyffryn's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Window efficiency improved
More low energy lighting installed
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Planning history
11 Tai Dyffryn 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
11 Tai Dyffryn has more than quadrupled in price since its earliest registered sale in 1997.
£619,000
Modelled from EPC, postcode comparables and a sale-price growth of 12.0% per year over 24 years.
£470,000
Growth on file: 12.0% per year over 24 years.
Sales timeline
22 June 2021Most recent
£470,000
+1466.7%over 24 years3 April 1997
£30,000
Median price across the last 5 sales in CF15 7TS: £407,000 (2025–2016).
Nearby sales in CF15 7TS
18 Tai Dyffryn, Nantgarw, Cardiff, CF15 7TS
Sold Jun 2025
£650,0004 Tai Dyffryn, Nantgarw, Cardiff, CF15 7TS
Sold Feb 2023
£310,00016 Tai Dyffryn, Nantgarw, Cardiff, CF15 7TS
Sold Apr 2018
£430,0008 Tai Dyffryn, Nantgarw, Cardiff, CF15 7TS
Sold Apr 2017
£375,00015 Tai Dyffryn, Nantgarw, Cardiff, CF15 7TS
Sold Dec 2016
£407,000
Versus other Tai Dyffryn homes
CO₂ Emissions for 11 Tai Dyffryn lags the street by a wide margin.
Price per m²
£2,217
Street avg £2,043
Floor Area
212 m²
Street avg 187 m²
Habitable Rooms
8 rooms
Street avg 7 rooms
CO₂ Emissions
6.4 t/year
Street avg 4.7 t/year
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Yr Hendre — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







