Blaen Bielly Farm, Mountain Road, Pentyrch, Cardiff, CF15 9QP
About Blaen Bielly Farm
Blaen Bielly Farm is a detached house in Pentyrch, Cardiff, Cardiff (CF15 9QP). It has a recorded floor area of 301 m² (around 3240 sq ft), construction records dating it to 1983-1990 and council tax band H. The latest certificate (June 2024) shows a D (score 61), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 74).
2 planning records sit against the property, 0 approved, 1 refused, 1 pending. An active application for an extension is awaiting a decision. At 301 m² the property is well over the postcode median (129 m² across 11 EPCs), placing it in the larger end of the local stock. A recent sale: £800,000 in January 2025. Today's modelled estimate of £940,000 is 17.5% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£247/sq ft) was about 98.4% above the typical sold price in the postcode.
Energy performance
Blaen Bielly Farm's carbon output runs well above what efficient homes in the postcode produce.
EPC Rating
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Level 3 Building Survey
Because the property is a large detached home over 300m², we believe a Level 3 building survey should be considered.
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Planning history
There is a planning application currently awaiting a decision.
2 applications on record at Blaen Bielly Farm, Mountain Road, Pentyrch, Cardiff, CF15 9QP
1 live now- Jun 2017FullOutcome in report
THE PROPOSAL IS FOR A TELECOMMUNICATIONS BASE STATION CONSISTING OF A 15.0M LATTICE MAST.SUPPORTING 3 NO ANTENNA,2 NO 300 DISHES C/F 12.50M AND 16.0M TOGETHER WITH ASSOCIATED WITH ASSOCIATED GROUND BASED EQUIPMENT CABINETS AND ANCILLARY DEVELOPMENTS THERE TO.
- Documents
- 59 docs on file
- Reference
- 17/00075/MNR
- More recent applications — locked
- ExtensionJan 2026Decision
Unlock Blaen Bielly Farm, Mountain Road, Pentyrch, Cardiff, CF15 9QP's full planning history
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- Every decision — granted, refused or withdrawn (1 on record)
- All 2 applications on this property in full
- The 71 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
Latest sale on Blaen Bielly Farm was the highest on Land Registry record across the postcode.
£940,000
Modelled from EPC, postcode comparables.
£800,000
Recorded with HM Land Registry.
Sales timeline
16 January 2025Most recent
£800,000
Median price across the last 5 sales in CF15 9QP: £300,000 (2022–2018).
Nearby sales in CF15 9QP
Pen Y Pentref, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Jun 2022
£163,000Warren House, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Nov 2021
£750,0003 Brynteg Court, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Jun 2021
£162,000Calon Y Garth, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Feb 2021
£300,000Swyn Y Garth, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Jul 2018
£425,000
Versus other Mountain Road homes
Years Held for Blaen Bielly Farm lags the street by a wide margin.
Price per m²
£2,658
Street avg £2,530
Floor Area
301 m²
Street avg 210 m²
Habitable Rooms
11 rooms
Street avg 7 rooms
CO₂ Emissions
11.0 t/year
Street avg 8.2 t/year
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Pentyrch Shops — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







