19b, East Heath Road, London, NW3 1AJ

19b is a detached house in London (NW3 1AJ). It has a recorded floor area of 117 m² (around 1259 sq ft), construction records dating it to before 1900 and council tax band G. At 117 m² this is the 6th smallest of 7 units on EPC record in the building, where floor areas span 37–118 m². The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (59 versus a best of 74). The latest certificate (March 2020) shows a D (score 59), a step below the typical UK home. The rating has held steady at D across 2 certificates since January 2009. Between certificates, lighting went from Very Poor to Poor; while hot-water efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 82), a 2-band jump.

Held since April 1998 — that's 28 years off the open market, well above the local norm. 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 £1,240,000 sits 249.3% above the 1998 sale of £355,000. On a £-per-square-foot basis, the last sale (£282/sq ft) was about 24.2% below the postcode norm.