Flat 3, 41 Eccleston Square, London, SW1V 1PB

Flat 3 is a two-bedroom detached house in London (SW1V 1PB). It has a recorded floor area of 65 m² (around 700 sq ft), construction records dating it to 1900-1929 and council tax band F. The latest certificate (January 2019) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since October 2008. Between certificates, hot-water efficiency went from Good to Very Good and lighting went from Very Poor to Average. The recommended improvements would push it to C (score 79). At 65 m² this is the 7th smallest of 8 units on EPC record in the building, where floor areas span 22–72 m². The building's EPC ratings span E to C across 8 units on file.

It hasn't traded since April 1995, a hold of 31 years that's notably long for the area. 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 £638,000 sits 571.6% above the 1995 sale of £95,000. On a £-per-square-foot basis, the last sale (£136/sq ft) was about 77% below the postcode norm.