Flat 3 1, 20 Gillingham Street, Westminster, London, SW1V 1AG

Flat 3 1 is a three-bedroom mid-terrace house in Westminster, London, London (SW1V 1AG). It has a recorded floor area of 67 m² (around 721 sq ft), construction records dating it to 2007 onwards and council tax band G. At 67 m² this is the 4th 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. Other recorded features include a balcony. The latest certificate (June 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, hot-water efficiency dropped from Very Good to Poor and lighting dropped from Good to Very Poor. The recommended improvements would push it to B (score 82). Main heating runs on electricity.

Untraded for 17 years, with the last transfer in September 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales.