Flat 2, 1 Belsize Park Gardens, London, NW3 4LB

Flat 2 is a one-bedroom semi-detached house in London (NW3 4LB). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to before 1900 and council tax band D. At 48 m² this is the smallest unit on EPC record across the building (48–80 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 (54 versus a best of 71). Other recorded features include a balcony. Period features are noted in the property record. The latest certificate (August 2018) shows an E (score 54), well below the UK norm with real room to improve. When first surveyed in November 2014 the rating was F, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good. The recommended improvements would lift it to B (score 83), a 3-band jump. Main heating runs on electricity.

At 48 m² it sits well below the postcode median (89 m² across 24 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 (£1,069/sq ft) was about 30.9% above the typical sold price in the postcode. Last sold in October 2015, so it's been off the market for around 11 years.