4 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
About 4 Parc Castell Y Mynach
4 Parc Castell Y Mynach is a detached house in Creigiau, Cardiff, Cardiff (CF15 9NU). It has a recorded floor area of 181 m² (around 1948 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (January 2014) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in January 2014 the rating was E, the property has climbed 1 band since. Between certificates, main heating went from Average to Good; while roof efficiency dropped from Very Good to Very Poor. The recommended improvements would push it to C (score 77). The latest certificate is from January 2014, so improvements made since then won't be reflected.
It hasn't traded since August 2003, a hold of 23 years that's notably long for the area. At 181 m² the property is well over the postcode median (120 m² across 19 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £570,000 sits 146.8% above the 2003 sale of £231,000. On a £-per-square-foot basis, the last sale (£119/sq ft) was about 46.6% below the postcode norm.
Energy performance
4 Parc Castell Y Mynach's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 21 Jan 2024
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water system changed
Get a survey for this property
Level 3 Building Survey
Because the property has been extended more than once, we believe a Level 3 building survey should be considered.
From £1,085 · Includes VAT
Planning history
4 Parc Castell Y Mynach has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
4 Parc Castell Y Mynach valuation sits well clear of the typical sold price in this postcode.
£570,000
Modelled from EPC, postcode comparables.
£231,000
Recorded with HM Land Registry.
Sales timeline
7 August 2003Most recent
£231,000
Median price across the last 5 sales in CF15 9NU: £470,000 (2025–2022).
Nearby sales in CF15 9NU
23 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Jul 2025
£470,0001 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Mar 2025
£560,00017 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Sept 2022
£366,20014 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Sept 2022
£635,00012 Parc Castell Y Mynach, Creigiau, Cardiff, CF15 9NU
Sold Apr 2022
£355,000
Versus other Parc Castell Y Mynach homes
4 Parc Castell Y Mynach outperforms the street on years held by a wide margin.
Price per m²
£1,276
Street avg £2,845
Floor Area
181 m²
Street avg 127 m²
Habitable Rooms
6 rooms
Street avg 6 rooms
CO₂ Emissions
6.2 t/year
Street avg 4.7 t/year
Similar properties nearby
1 Bryn Briallu, Creigiau
CF15 9PR
1 Clos Goch, Pentyrch
CF15 9RA
1 Brodeg, Pentyrch
CF15 9TF
1 Crib Y Lan, Gwaelod Y Garth
CF15 9LA
1 Bryn Yr Eglwys, Pentyrch
CF15 9QW
1 Clawdd Shon Cottages, Temperance Road, Pentyrch
CF15 9PU
1 Crib Y Llan Cottages, Gwaelod Y Garth
CF15 9JJ
1 Clos Darren Las, Creigiau
CF15 9SL
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Tregarth Lodge — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







