Harlech House, Flat 7, Heol Isaf, Radyr, Cardiff, CF15 8AP
About Harlech House
Harlech House is a semi-detached house in Radyr, Cardiff, Cardiff (CF15 8AP). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to 1983-1990 and council tax band D. At 73 m² this is the 4th smallest of 12 units on EPC record in Harlech House, where floor areas span 70–75 m². The building's EPC ratings span D to B across 12 units on file. The latest certificate (February 2021) shows a C (score 75), near the top of the C band.
Held since November 1998 — that's 28 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £176,000 sits 252% above the 1998 sale of £50,000. On a £-per-square-foot basis, the last sale (£64/sq ft) was about 61.5% below the postcode norm.
Energy performance
EPC Rating
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Planning history
Harlech House has no planning applications on record.
But the area is active
3 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Harlech House's estimated value is more than triple its earliest registered sale price (1998).
£176,000
Modelled from EPC, postcode comparables.
£50,000
Recorded with HM Land Registry.
Sales timeline
20 November 1998Most recent
£50,000
Median price across the last 5 sales in CF15 8AP: £150,000 (2024–2019).
Nearby sales in CF15 8AP
Harlech House, Flat 3, Heol Isaf, Radyr, Cardiff, CF15 8AP
Sold Mar 2024
£190,000Harlech House, Flat 9, Heol Isaf, Radyr, Cardiff, CF15 8AP
Sold Nov 2022
£162,000Harlech House, Flat 6, Heol Isaf, Radyr, Cardiff, CF15 8AP
Sold Jul 2022
£150,000Harlech House, Flat 4, Heol Isaf, Radyr, Cardiff, CF15 8AP
Sold Dec 2021
£142,000Harlech House, Flat 1, Heol Isaf, Radyr, Cardiff, CF15 8AP
Sold Oct 2015
£130,000
Versus other Heol Isaf homes
On price per m², Harlech House runs well behind the street norm.
Price per m²
£685
Street avg £2,122
Floor Area
73 m²
Street avg 73 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
2.1 t/year
Street avg 2.2 t/year
Similar properties nearby
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Danybryn — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.







