Flat 1, 3 Marlborough Road, Cardiff, CF23 5BT
About Flat 1
Flat 1 is a mid-terrace house in Cardiff (CF23 5BT). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to before 1900 and council tax band B. At 32 m² this is the 9th smallest of 16 units on EPC record in the building, where floor areas span 22–68 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (February 2025) shows a C (score 74). When first surveyed in January 2010 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and lighting went from Average to Very Good.
Everything you need to know about Flat 1
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Flat 1's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Windows upgraded, improving insulation
Heating controls upgraded for better temperature management
Wall insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
Flat 1 has no planning applications on record.
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
Flat 1 has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£143,000
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 CF23 5BT: £485,000 (2024–2017).
Nearby sales in CF23 5BT
Versus other Marlborough Road homes
Flat 1 outperforms the street on epc rating by a wide margin.
EPC Rating
74 (C)
Street avg 65 (D)
Floor Area
32 m²
Street avg 46 m²
CO₂ Emissions
1.2 t/year
Street avg 2.5 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Everything you need to know about Flat 1
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
9/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Marlborough Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.