Warren House, Mountain Road, Pentyrch, Cardiff, CF15 9QP
About Warren House
Warren House is a detached house in Pentyrch, Cardiff, Cardiff (CF15 9QP). It has a recorded floor area of 257 m² (around 2766 sq ft) and construction records dating it to before 1900. The latest certificate (March 2013) shows a D (score 61), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 74). Main heating runs on oil. The latest certificate is from March 2013, so improvements made since then won't be reflected.
At 257 m² the property is well over the postcode median (129 m² across 11 EPCs), placing it in the larger end of the local stock. Across 1997–2021, sale prices on this property compounded at 5% per year. On a £-per-square-foot basis, the last sale (£271/sq ft) was about 117.9% above the typical sold price in the postcode. Last sale on file: £750,000 in November 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Energy performance
Warren House'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This certificate is over 10 years old and is no longer valid.Expired 11 Mar 2023
EPC Rating
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, has been extended more than once, and has no mains gas supply, we believe a Level 3 building survey should be considered.
From £1,360 · Includes VAT
Planning history
Warren House 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
Warren House has more than tripled in price since its earliest registered sale in 1997.
£821,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.0% per year over 24 years.
£750,000
Growth on file: 5.0% per year over 24 years.
Sales timeline
19 November 2021Most recent
£750,000
+33.9%over 5 years28 July 2016
£560,000
+138.3%over 18 years18 December 1997
£235,000
Median price across the last 5 sales in CF15 9QP: £300,000 (2025–2018).
Nearby sales in CF15 9QP
Blaen Bielly Farm, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Jan 2025
£800,000Pen Y Pentref, Mountain Road, Pentyrch, Cardiff, CF15 9QP
Sold Jun 2022
£163,0003 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
Warren House outperforms the street on price per m² by a wide margin.
Price per m²
£2,918
Street avg £2,478
Floor Area
257 m²
Street avg 217 m²
Habitable Rooms
8 rooms
Street avg 8 rooms
CO₂ Emissions
9.8 t/year
Street avg 8.3 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.







