21 Brook Street, Cardiff, CF11 6LG
About 21 Brook Street
21 Brook Street is a mid-terrace house in Cardiff (CF11 6LG). It has a recorded floor area of 105 m² (around 1130 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (December 2025) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since February 2014. Between certificates, lighting went from Very Poor to Poor; while roof efficiency dropped from Good to Average and window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 74). This certificate was lodged in the last six months, so the rating reflects current condition.
Everything you need to know about 21 Brook Street
The true value, the hidden risks and the full sale history, in one report.
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The data behind every report
Energy performance
The EPC has just been inspected, so the rating reflects current condition.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Loft insulation upgraded to recommended levels
More low energy lighting installed
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Level 2 HomeBuyer Report
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Planning history
21 Brook Street has no planning applications on record.
But the area is active
12 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
21 Brook Street has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£266,000
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 CF11 6LG: £225,000 (2023–2016).
Versus other Brook Street homes
Floor Area for 21 Brook Street lags the street by a wide margin.
EPC Rating
64 (D)
Street avg 66 (D)
Floor Area
105 m²
Street avg 122 m²
CO₂ Emissions
3.4 t/year
Street avg 4.4 t/year
Habitable Rooms
5 rooms
Street avg 6 rooms
Everything you need to know about 21 Brook Street
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
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Despenser Gardens — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.