21 Allerton Street, Cardiff, CF11 6SJ
About 21 Allerton Street
21 Allerton Street is a two-bedroom mid-terrace house in Cardiff (CF11 6SJ). It has a recorded floor area of 85 m² (around 915 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (May 2021) shows a D (score 58), a step below the typical UK home. The rating has held steady at D across 2 certificates since August 2009. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Poor to Good; while roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 77).
Held since May 2003 — that's 23 years off the open market, well above the local norm. Across 2000–2003, sale prices on this property compounded at 22.9% per year. Today's modelled estimate of £199,000 sits 123.6% above the 2003 sale of £89,000.
What this property has
Inside
- Bedrooms2
- Bathrooms1
Outside
- Private gardenYes
Everything you need to know about 21 Allerton 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
EPC Rating
Property Improvements
Changes detected from historical EPC data
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 and has been extended more than once, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
21 Allerton 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 Allerton Street's modelled value sits at over four times its earliest registered sale price (2000).
£199,000
Modelled from EPC, postcode comparables and a sale-price growth of 22.9% per year over 3 years.
£89,000
Growth on file: 22.9% per year over 3 years.
Sales timeline
22 May 2003Most recent
£89,000
+89.6%over 3 years16 April 2000
£46,950
Median price across the last 5 sales in CF11 6SJ: £200,000 (2024–2016).
Nearby sales in CF11 6SJ
Versus other Allerton Street homes
On epc rating, 21 Allerton Street runs well behind the street norm.
Price per m²
£1,047
Street avg £1,393
Floor Area
85 m²
Street avg 88 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
4.2 t/year
Street avg 3.5 t/year
Everything you need to know about 21 Allerton 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
Similar properties nearby
The neighbourhood at a glance
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Clare Road — bus stop.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.