Flat 1, 1 Marlborough Road, Cardiff, CF23 5BT
About Flat 1
Flat 1 is an end-of-terrace house in Cardiff (CF23 5BT). It has a recorded floor area of 28 m² (around 301 sq ft) and construction records dating it to 1900-1929. The latest certificate (July 2026) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (July 2016); the latest reading is one band lower. Between certificates, window efficiency dropped from Average to Poor and lighting dropped from Very Good to Good. The recommended improvements would push it to C (score 75). This certificate was lodged in the last six months, so the rating reflects current condition. At 28 m² this is the 2nd smallest of 13 units on EPC record in the building, where floor areas span 25–224 m². The building's EPC ratings span E to C across 13 units on file.
At 28 m² it's 24.3% smaller than the typical home in the postcode (37 m² median across 51 EPCs).
Everything you need to know about Flat 1
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Energy performance
Flat 1's carbon output is low for the local stock.
EPC Rating
Certificate validity
Valid until 3 July 2036
Property Improvements
Changes detected from historical EPC data
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.
£171,000
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
On floor area, Flat 1 runs well behind the street norm.
EPC Rating
68 (D)
Street avg 66 (D)
Floor Area
28 m²
Street avg 44 m²
CO₂ Emissions
1.4 t/year
Street avg 2.3 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 · from £14.99
One time fee only - money back guarantee
The data behind every report
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The neighbourhood at a glance
Crime
169/mo
Falling 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.