17b, Ravensdon Street, Lambeth, London, SE11 4AQ

17b is a mid-terrace house in Lambeth, London, London (SE11 4AQ). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to before 1900 and council tax band C. At 47 m² this is the smallest unit on EPC record across the building (47–183 m²). The building's EPC ratings span E to C, with this unit at the top. On EPC score it ranks first in the building (70 versus a worst of 41). The latest certificate (November 2023) shows a C (score 70). When first surveyed in December 2008 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Very Poor to Poor and hot-water efficiency went from Average to Good.

Untraded for 30 years, with the last transfer in March 1996. 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 £448,000 sits 501.3% above the 1996 sale of £74,500. On a £-per-square-foot basis, the last sale (£147/sq ft) was about 52.4% below the postcode norm. At 47 m² it sits well below the postcode median (120 m² across 18 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 72% of similar EPCs).