19 Allerton Street, Cardiff, CF11 6SJ

19 Allerton Street is a mid-terrace house in Cardiff (CF11 6SJ). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to before 1900 and council tax band B. At 42 m² this is the smallest unit on EPC record across the building (42–110 m²). The building's EPC ratings span E to C across 14 units on file. The latest certificate (December 2017) shows a D (score 65), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 77).

It hasn't traded since December 2008, a hold of 18 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 42 m² it sits well below the postcode median (87 m² across 13 EPCs), making it one of the more compact homes locally. Today's modelled estimate of £125,000 is 13.6% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£243/sq ft) was about 175% above the typical sold price in the postcode.