15a, Finsbury Park Road, London, N4 2LA

15a is a mid-terrace house in London (N4 2LA). It has a recorded floor area of 61 m² (around 652 sq ft) and construction records dating it to before 1900. The latest certificate (January 2010) shows an F (score 35), near the bottom of the EPC scale. Earlier certificates rated it C (November 2008); the latest reading is 3 bands lower. Between certificates, lighting went from Very Poor to Poor; while window efficiency dropped from Average to Very Poor and hot-water efficiency dropped from Good to Poor. Main heating runs on lpg. The latest certificate is from January 2010, so improvements made since then won't be reflected.

Held since January 1999 — that's 27 years off the open market, well above the local norm. At 61 m² it's 20.3% smaller than the typical home in the postcode (76 m² median across 41 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 1997–1999, sale prices on this property compounded at 44.9% per year. Today's modelled estimate of £460,000 sits 283.3% above the 1999 sale of £120,000. On a £-per-square-foot basis, the last sale (£184/sq ft) was about 61.2% below the postcode norm.