6a, Wontner Road, London, SW17 7QT

6a is a mid-terrace house in London (SW17 7QT). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1900-1929 and council tax band D. At 74 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 45–94 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 (73 versus a worst of 52). The latest certificate (February 2024) shows a C (score 73). When first surveyed in June 2013 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 Poor to Average and lighting went from Poor to Very Good.

Held since November 1999 — that's 27 years off the open market, well above the local norm. Sale prices here have outpaced London HPI: 27.7% per year against 0% for the wider region. Today's modelled estimate of £668,000 sits 227.5% above the 1999 sale of £204,000. On a £-per-square-foot basis, the last sale (£256/sq ft) was about 33.8% below the postcode norm. One planning record on file: an extension approved in 2021. Past consents include an extension, meaningful when judging how the property has evolved. At 74 m² it's 27.5% smaller than the typical home in the postcode (102 m² median across 33 EPCs). Its energy rating outperforms most of the postcode (better than 76% of similar EPCs).