Flat 4, 35 Collingwood Street, Coundon, Bishop Auckland, DL14 8LG

Flat 4 is a semi-detached house in Coundon, Bishop Auckland, Bishop Auckland (DL14 8LG). It has a recorded floor area of 35 m² (around 377 sq ft) and construction records dating it to 1900-1929. At 35 m² this is the smallest unit on EPC record across the building (35–65 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 (49 versus a best of 78). The latest certificate (January 2020) shows an E (score 49), well below the UK norm with real room to improve. Earlier certificates rated it C (April 2019); the latest reading is 2 bands lower. Between certificates, wall efficiency dropped from Good to Poor and roof efficiency dropped from Good to Average. The recommended improvements would lift it to C (score 71), a 2-band jump. Main heating runs on electricity.

At 35 m² it sits well below the postcode median (80 m² across 37 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 78% of similar EPCs).