Flat 2 1, 20 Gillingham Street, Westminster, London, SW1V 1AG

Flat 2 1 is a three-bedroom mid-terrace house in Westminster, London, London (SW1V 1AG). It has a recorded floor area of 83 m² (around 893 sq ft), construction records dating it to 2007 onwards and council tax band G. At 83 m² this is the 5th smallest of 8 units on EPC record in the building, where floor areas span 61–113 m². The building's EPC ratings span C to B, with this unit at the bottom. The latest certificate (March 2019) shows a C (score 79), near the top of the C band. Earlier certificates rated it B (March 2009); the latest reading is one band lower. Between certificates, window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 81).

Untraded for 17 years, with the last transfer in July 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. At 83 m² the property is well over the postcode median (61 m² across 36 EPCs), placing it in the larger end of the local stock. On a £-per-square-foot basis, the last sale (£964/sq ft) was about 16.2% below the postcode norm.