643a, North Circular Road, Brent, London, NW2 7AY

643a is an end-of-terrace house in Brent, London, London (NW2 7AY). It has a recorded floor area of 56 m² (around 603 sq ft) and construction records dating it to 1900-1929. At 56 m² this is the 8th smallest of 10 units on EPC record in the building, where floor areas span 13–92 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (November 2018) shows an E (score 43), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since September 2009. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and lighting went from Average to Very Good; while hot-water efficiency dropped from Good to Very Poor and main heating dropped from Good to Very Poor. The recommended improvements would lift it to C (score 71), a 2-band jump. Main heating runs on electricity.

Untraded for 19 years, with the last transfer in May 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Sale prices here have outpaced London HPI: 16.4% per year against 0% for the wider region. Today's modelled estimate of £387,000 is 12.2% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£572/sq ft) was about 60.9% above the typical sold price in the postcode. At 56 m² the property is well over the postcode median (41 m² across 10 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs).