Flat 4, 5 Onslow Square, London, SW7 3NJ

Flat 4 is a two-bedroom mid-terrace house in London (SW7 3NJ). It has a recorded floor area of 101 m² (around 1087 sq ft), construction records dating it to 1900-1929 and council tax band G. At 101 m² this is the smallest unit on EPC record across the building (101–211 m²). The building's EPC ratings span E to C across 7 units on file. The latest certificate (August 2012) shows a D (score 59), a step below the typical UK home. The rating has held steady at D across 3 certificates since December 2010. Between certificates, lighting dropped from Very Good to Very Poor and main heating dropped from Good to Poor. The recommended improvements would push it to C (score 75). Main heating runs on electricity. The latest certificate is from August 2012, so improvements made since then won't be reflected.

Across 2011–2015, sale prices on this property compounded at 31.3% per year. Today's modelled estimate of £1,490,000 is 47.7% below the 2015 sale of £2,850,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£2,622/sq ft) was about 301.3% above the typical sold price in the postcode. On the market in December 2015 and unlisted since — roughly 10 years. Across the public record there are 4 sales, relatively high churn for a single property. 2 planning records sit against the property, 2 approved, 0 refused.