Tompion House, Flat 49, Percival Street, Islington, London, EC1V 0HX

Tompion House is a two-bedroom mid-terrace house in Islington, London, London (EC1V 0HX). It has a recorded floor area of 33 m² (around 355 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (December 2019) shows an E (score 51), well below the UK norm with real room to improve. Earlier certificates rated it C (July 2009); the latest reading is 2 bands lower. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Good to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Very Poor. The recommended improvements would lift it to C (score 75), a 2-band jump. Main heating runs on electricity. At 33 m² this is the 4th 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 across 24 units on file.

At 33 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. On a £-per-square-foot basis, the last sale (£859/sq ft) was about 55.3% above the typical sold price in the postcode. Last sold in April 2017, so it's been off the market for around 9 years.