Flat 1, 90 Onslow Gardens, London, SW7 3BS

Flat 1 is a mid-terrace house in London (SW7 3BS). It has a recorded floor area of 44 m² (around 474 sq ft), construction records dating it to before 1900 and council tax band D. At 44 m² this is the smallest unit on EPC record across the building (44–150 m²). The building's EPC ratings span E to C, with this unit at the top. The latest certificate (August 2020) shows a C (score 69), just inside the C band. When first surveyed in April 2010 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Poor to Very Poor.

At 44 m² it sits well below the postcode median (67 m² across 26 EPCs), making it one of the more compact homes locally. Across 2012–2021, sale prices on this property compounded at 2.1% per year. On a £-per-square-foot basis, the last sale (£1,246/sq ft) was about 65% above the typical sold price in the postcode. Sold January 2021 for £590,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.