51b, Aylesford Street, London, SW1V 3RY

51b is a mid-terrace house in London (SW1V 3RY). It has a recorded floor area of 18 m² (around 194 sq ft), construction records dating it to 1900-1929 and council tax band D. At 18 m² this is the smallest unit on EPC record across the building (18–79 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (November 2022) shows a C (score 74). When first surveyed in November 2012 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Average and lighting went from Average to Very Good.

Untraded for 19 years, with the last transfer in July 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2004–2007, sale prices on this property compounded at 10% per year. Today's modelled estimate of £381,000 sits 117.7% above the 2007 sale of £175,000. On a £-per-square-foot basis, the last sale (£903/sq ft) was about 69.8% above the typical sold price in the postcode. At 18 m² it sits well below the postcode median (41 m² across 52 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 87% of similar EPCs).