1 Loudoun Square, Cardiff, CF10 5JA
About 1 Loudoun Square
1 Loudoun Square is a detached house in Cardiff (CF10 5JA). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to 1950-1966 and council tax band A. At 42 m² this is the 3rd smallest of 19 units on EPC record in the building, where floor areas span 40–154 m². The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (May 2025) shows a D (score 67), on the cusp of jumping into the C band. Earlier certificates rated it C (October 2008); the latest reading is one band lower. Between certificates, window efficiency went from Average to Good and lighting went from Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 74).
At 42 m² it sits well below the postcode median (102 m² across 18 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement.
Everything you need to know about 1 Loudoun Square
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Energy performance
1 Loudoun Square sits at the bottom of the postcode for energy efficiency — meaningful headroom to improve.
EPC Rating
Certificate validity
Valid until 28 May 2035
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Window efficiency improved
More low energy lighting installed
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Planning history
1 Loudoun Square has no planning applications on record.
But the area is active
5 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
1 Loudoun Square has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£117,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Median price across the last 5 sales in CF10 5JA: £90,000 (2008–2002).
Versus other Loudoun Square homes
EPC Rating for 1 Loudoun Square lags the street by a wide margin.
EPC Rating
67 (D)
Street avg 74 (C)
Floor Area
42 m²
Street avg 42 m²
CO₂ Emissions
2.0 t/year
Street avg 1.6 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Everything you need to know about 1 Loudoun Square
The true value, the hidden risks and the full sale history, in one report.
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
485/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
South Loudon Place — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.