21c, Kingsgate Road, London, NW6 4TD

21c is a mid-terrace house in London (NW6 4TD). It has a recorded floor area of 54 m² (around 581 sq ft) and construction records dating it to 1930-1949. At 54 m² this is the 21st smallest of 33 units on EPC record in the building, where floor areas span 14–129 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 (52 versus a best of 79). The latest certificate (September 2018) shows an E (score 52), well below the UK norm with real room to improve. Earlier certificates rated it D (October 2009); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Good and lighting went from Poor to Good. The recommended improvements would lift it to C (score 74), a 2-band jump.

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 10 years since the last transfer (April 2016). Across the public record there are 4 sales, relatively high churn for a single property. Across 1997–2016, sale prices on this property compounded at 10.2% per year. On a £-per-square-foot basis, the last sale (£894/sq ft) was about 112.5% above the typical sold price in the postcode. 2 planning records sit against the property, 1 approved, 1 refused.