Flat B1, 6 Airlie Gardens, London, W8 7AJ

Flat B1 is a mid-terrace house in London (W8 7AJ). It has a recorded floor area of 63 m² (around 678 sq ft), construction records dating it to before 1900 and council tax band G. The latest certificate (April 2012) shows an F (score 35), near the bottom of the EPC scale. The recommended improvements would lift it to B (score 84), a 4-band jump. Main heating runs on electricity. The latest certificate is from April 2012, so improvements made since then won't be reflected.

Sale prices here have outpaced London HPI: 11.6% per year against 0% for the wider region. Today's modelled estimate of £1,196,000 is 14.3% below the 2014 sale of £1,395,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£2,057/sq ft) was about 276.7% above the typical sold price in the postcode. At 63 m² it's 21.3% smaller than the typical home in the postcode (80 m² median across 31 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in March 2014 and unlisted since — roughly 12 years.