21b, Bostall Lane, Greenwich, London, SE2 0NH

21b is a mid-terrace house in Greenwich, London, London (SE2 0NH). It has a recorded floor area of 38 m² (around 409 sq ft), construction records dating it to 1900-1929 and council tax band B. At 38 m² this is the smallest unit on EPC record across the building (38–121 m²). The building's EPC ratings span E to C, with this unit at the top. The latest certificate (September 2023) shows a C (score 72). When first surveyed in May 2022 the rating was E, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Very Poor to Good, lighting went from Poor to Very Good and main heating went from Average to Good; while window efficiency dropped from Good to Average.

Across 1996–2023, sale prices on this property compounded at 7.5% per year. Today's modelled estimate of £274,000 sits 53.1% above the 2023 sale of £179,000. On a £-per-square-foot basis, the last sale (£438/sq ft) was about 124.8% above the typical sold price in the postcode. At 38 m² it sits well below the postcode median (81 m² across 36 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 78% of similar EPCs). Last sale on file: £179,000 in May 2023.