Flat 2, 17 Onslow Square, London, SW7 3NJ

Flat 2 is a two-bedroom mid-terrace house in London (SW7 3NJ). It has a recorded floor area of 113 m² (around 1216 sq ft), construction records dating it to 1900-1929 and council tax band G. The latest certificate (March 2023) shows a C (score 72). When first surveyed in February 2012 the rating was D, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 83). At 113 m² this is the 2nd smallest of 3 units on EPC record in the building, where floor areas span 110–116 m².

Held since February 1997 — that's 29 years off the open market, well above the local norm. Across 1996–1997, sale prices on this property compounded at 69.5% per year. Today's modelled estimate of £1,448,000 sits 189.6% above the 1997 sale of £500,000. On a £-per-square-foot basis, the last sale (£411/sq ft) was about 55.3% below the postcode norm.