23b, Hiley Road, London, NW10 5PT

23b is a two-bedroom mid-terrace house in London (NW10 5PT). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to before 1900 and council tax band C. At 73 m² this is the largest unit on EPC record across the building (38–73 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 73). The latest certificate (March 2020) shows an E (score 54), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 72), a 2-band jump.

It hasn't traded since August 2010, a hold of 16 years that's notably long for the area. Across the public record there are 4 sales, relatively high churn for a single property. Sale prices here have outpaced London HPI: 11.1% per year against 0% for the wider region. Today's modelled estimate of £523,000 sits 71.5% above the 2010 sale of £305,000. On a £-per-square-foot basis, the last sale (£388/sq ft) was about 37.2% below the postcode norm. One planning record on file: a loft conversion approved in 2008. Past consents include a loft conversion, meaningful when judging how the property has evolved. It lags the bulk of the postcode on energy efficiency (less efficient than 90% of similar EPCs).