Tompion House, Flat 46, Percival Street, Islington, London, EC1V 0HX

Tompion House is an end-of-terrace house in Islington, London, London (EC1V 0HX). It has a recorded floor area of 30 m² (around 323 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (January 2013) shows an F (score 38), near the bottom of the EPC scale. The recommended improvements would lift it to C (score 70), a 3-band jump. Main heating runs on electricity. The latest certificate is from January 2013, so improvements made since then won't be reflected. At 30 m² this is the 2nd smallest of 24 units on EPC record in Tompion House, where floor areas span 29–148 m². The building's EPC ratings span F to C, with this unit at the bottom. On EPC score it ranks last in the building (38 versus a best of 78).

At 30 m² it sits well below the postcode median (57 m² across 23 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2007–2013, sale prices on this property compounded at 6.7% per year. Today's modelled estimate of £316,000 is 17% above the 2013 sale price. On a £-per-square-foot basis, the last sale (£836/sq ft) was about 54.7% above the typical sold price in the postcode. Last changed hands 13 years ago, in July 2013. 2 planning records sit against the property, 2 approved, 0 refused.