3 Fairfax Mansions, Flat 1, Finchley Road, London, NW3 6JY

3 Fairfax Mansions is an end-of-terrace house in London (NW3 6JY). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to before 1900 and council tax band B. At 37 m² this is the 5th smallest of 6 units on EPC record in the building, where floor areas span 20–69 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 (39 versus a best of 70). The latest certificate (December 2021) shows an E (score 39), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since November 2011. Between certificates, hot-water efficiency dropped from Average to Poor and main heating dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 73), a 2-band jump. Main heating runs on electricity.

At 37 m² the property is well over the postcode median (26 m² across 19 EPCs), placing it in the larger end of the local stock.