23 Allerton Street, Cardiff, CF11 6SJ
About 23 Allerton Street
23 Allerton Street is a three-bedroom end-of-terrace house in Cardiff (CF11 6SJ). It has a recorded floor area of 110 m² (around 1184 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (January 2023) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since October 2015. Between certificates, roof efficiency went from Very Poor to Good and window efficiency went from Average to Good; while wall efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 85), a 2-band jump. Period features are noted in the property record.
Held since October 1997 — that's 29 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £223,000 sits 486.8% above the 1997 sale of £38,000. On a £-per-square-foot basis, the last sale (£32/sq ft) was about 65.9% below the postcode norm. At 110 m² it's 26.4% larger than the typical home in the postcode (87 m² median across 13 EPCs).
What this property has
Inside
- Bedrooms3
- Bathrooms1
- Dining roomYes
Building
- Period featuresYes
Everything you need to know about 23 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
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Window efficiency improved
Roof insulation improved
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919 and has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £885 · Includes VAT
Planning history
23 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
23 Allerton Street's modelled value sits at over four times its earliest registered sale price (1997).
£223,000
Modelled from EPC, postcode comparables.
£38,000
Recorded with HM Land Registry.
Sales timeline
31 October 1997Most recent
£38,000
Median price across the last 5 sales in CF11 6SJ: £200,000 (2024–2016).
Nearby sales in CF11 6SJ
Versus other Allerton Street homes
Years Held for 23 Allerton Street runs comfortably ahead of the street norm.
Price per m²
£345
Street avg £1,457
Floor Area
110 m²
Street avg 86 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
3.9 t/year
Street avg 3.6 t/year
Everything you need to know about 23 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
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.