11 Allerton Street, Cardiff, CF11 6SJ
About 11 Allerton Street
11 Allerton Street is a mid-terrace house in Cardiff (CF11 6SJ). It has a recorded floor area of 87 m² (around 936 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (June 2026) shows a C (score 78), near the top of the C band. The rating has held steady at C across 2 certificates since November 2015. Between certificates, wall efficiency went from Very Poor to Poor; while window efficiency dropped from Good to Average and lighting dropped from Very Good to Good. The recommended improvements would push it to B (score 84). This certificate was lodged in the last six months, so the rating reflects current condition.
Held since January 2007 — that's 20 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £207,000 sits 102% above the 2007 sale of £102,500. On a £-per-square-foot basis, the last sale (£109/sq ft) was about 23.7% above the typical sold price in the postcode.
Everything you need to know about 11 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
The EPC has just been inspected, so the rating reflects current condition.
EPC Rating
Certificate validity
Valid until 18 June 2036
Property Improvements
Changes detected from historical EPC data
Wall 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
11 Allerton Street has no planning applications on record.
But the area is active
10 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Sales history & valuation
The latest sale landed at the peak of the pre-credit-crunch market — a high-water reference point.
£207,000
Modelled from EPC, postcode comparables.
£102,500
Recorded with HM Land Registry.
Sales timeline
31 January 2007Most recent
£102,500
Median price across the last 5 sales in CF11 6SJ: £200,000 (2024–2016).
Nearby sales in CF11 6SJ
Versus other Allerton Street homes
11 Allerton Street outperforms the street on epc rating by a wide margin.
Price per m²
£1,178
Street avg £1,386
Floor Area
87 m²
Street avg 88 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
2.4 t/year
Street avg 3.6 t/year
Everything you need to know about 11 Allerton Street
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
Similar properties nearby
The neighbourhood at a glance
Crime
362/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.