105a, Flat 1, Northgate, Hartlepool, TS24 0JX

105a is a mid-terrace house in Hartlepool (TS24 0JX). It has a recorded floor area of 41 m² (around 441 sq ft) and construction records dating it to 1900-1929. At 41 m² this is the 2nd smallest of 4 units on EPC record in 105a, where floor areas span 39–42 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (41 versus a best of 71). The latest certificate (April 2015) shows an E (score 41), well below the UK norm with real room to improve. Earlier certificates rated it D (February 2012); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Poor; while hot-water efficiency dropped from Good to Very Poor and lighting dropped from Average to Very Poor. The recommended improvements would lift it to C (score 78), a 2-band jump. Main heating runs on to be used only when there is no heating/hot. The latest certificate is from April 2015, so improvements made since then won't be reflected.

At 41 m² it sits well below the postcode median (68 m² across 20 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs).