18 20, Flat E, Friern Barnet Road, London, N11 1NA

18 20 is an end-of-terrace house in London (N11 1NA). It has a recorded floor area of 53 m² (around 570 sq ft) and construction records dating it to before 1900. At 53 m² this is the largest unit on EPC record across 18 20 (35–53 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (September 2021) shows a C (score 69), just inside the C band. The rating has held steady at C across 2 certificates since February 2011. Between certificates, lighting went from Good to Very Good.

Held since November 1998 — that's 28 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £329,000 sits 356.9% above the 1998 sale of £72,000. On a £-per-square-foot basis, the last sale (£126/sq ft) was about 19.5% below the postcode norm.