1 Costons Court, Costons Lane, Greenford, UB6 8RW

1 Costons Court is an end-of-terrace house in Greenford (UB6 8RW). It has a recorded floor area of 55 m² (around 592 sq ft), construction records dating it to 1930-1949 and council tax band C. At 55 m² this is the largest unit on EPC record across the building (49–55 m²). The building's EPC ratings span E to D, with this unit at the top. On EPC score it ranks first in the building (68 versus a worst of 52). The latest certificate (July 2019) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since August 2009. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Very Good to Average. The recommended improvements would push it to C (score 78).

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 £279,000 sits 572.3% above the 1998 sale of £41,500.