Model valuation£417,0008 Busby Close
Local market context
9 Parc Castell Y Mynach is a four-bedroom detached house in Creigiau, Cardiff, Cardiff (CF15 9NU). It has a recorded floor area of 145 m² (around 1561 sq ft), construction records dating it to 1967-1975 and council tax band G. The latest certificate (October 2015) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since May 2009. Between certificates, roof efficiency dropped from Good to Very Poor. The recommended improvements would push it to C (score 76). The latest certificate is from October 2015, so improvements made since then won't be reflected. Records show the property has been extended at some point in its history.
One planning record on file: an extension approved in 2008. Past consents include an extension, meaningful when judging how the property has evolved. At 145 m² it's 20.8% larger than the typical home in the postcode (120 m² median across 19 EPCs). Last changed hands 9 years ago, in February 2018. Across 2008–2018, sale prices on this property compounded at 9% per year. Today's modelled estimate of £502,000 is 37.5% above the 2018 sale price.
9 Parc Castell Y Mynach's carbon output runs well above what efficient homes in the postcode produce.
This certificate is over 10 years old and is no longer valid.Expired 13 Oct 2025
Certificate validity
Expired on 13 October 2025
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1 application on record at 9 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Extension: Two storey · Side of property
TWO STOREY EXTENSION TO SIDE, LOUNGE, UTILITY, WC ON GROUND FLOOR WITH ENSUITE BEDROOM ON FIRST FLOOR. SINGLE STOREY EXTENSION TO REAR FOR DINING ROOM
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Sale price has at least doubled since 2008.
£502,000
Modelled from EPC, postcode comparables and a sale-price growth of 9.0% per year over 9 years.
£365,000
Growth on file: 9.0% per year over 9 years.
2 February 2018Most recent
£365,000
+14.1%over 8 years27 August 2009
£320,000
+93.9%over 10 months7 November 2008
£165,000
Median price across the last 5 sales in CF15 9NU: £470,000 (2025–2022).
23 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Jul 2025
1 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Mar 2025
17 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Sept 2022
14 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Sept 2022
12 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Apr 2022
CO₂ Emissions for 9 Parc Castell Y Mynach lags the street by a wide margin.
Price per m²
£2,517
Street avg £2,772
Floor Area
145 m²
Street avg 129 m²
Habitable Rooms
6 rooms
Street avg 6 rooms
CO₂ Emissions
6.0 t/year
Street avg 4.7 t/year
Property research, connected
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Crime
85/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Tregarth Lodge — bus stop.
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