50c, Marlborough Road, Cardiff, CF23 5BX
About 50c
50c is an end-of-terrace house in Cardiff (CF23 5BX). It has a recorded floor area of 41 m² (around 441 sq ft) and construction records dating it to 1900-1929. At 41 m² this is the 31st smallest of 72 units on EPC record in the building, where floor areas span 22–214 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (40 versus a best of 80). The latest certificate (March 2025) shows an E (score 40), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since January 2015. Between certificates, window efficiency went from Poor to Average; while main heating dropped from Average to Very Poor. The recommended improvements would lift it to B (score 82), a 3-band jump. Main heating runs on electricity.
At 41 m² it sits well below the postcode median (59 m² across 71 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs).
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating system changed
Heating controls upgraded for better temperature management
Hot water system changed
Windows upgraded, improving insulation
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, has no mains gas supply, and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
50c 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
50c has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£149,000
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 5BX: £210,000 (2022–2020).
Nearby sales in CF23 5BX
50 Marlborough Road, Cardiff, CF23 5BX
Sold Mar 2022
£380,00042 Marlborough Road, Cardiff, CF23 5BX
Sold Oct 2021
£10,53042a, Marlborough Road, Cardiff, CF23 5BX
Sold Mar 2021
£215,000Flat 1, 6 Marlborough Road, Cardiff, CF23 5BX
Sold Dec 2020
£210,00042b, Marlborough Road, Cardiff, CF23 5BX
Sold Sept 2020
£199,950
Versus other Marlborough Road homes
On epc rating, 50c runs well behind the street norm.
EPC Rating
40 (E)
Street avg 63 (D)
Floor Area
41 m²
Street avg 51 m²
CO₂ Emissions
3.2 t/year
Street avg 2.4 t/year
Habitable Rooms
2 rooms
Street avg 2 rooms
Similar properties nearby
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.







