9a, Derwent Road, London, N13 4PY

9a is a semi-detached house in London (N13 4PY). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1900-1929 and council tax band C. At 46 m² this is the 2nd smallest of 3 units on EPC record in the building, where floor areas span 37–62 m². The building's EPC ratings span E to D, with this unit at the bottom. On EPC score it ranks last in the building (53 versus a best of 66). The latest certificate (November 2018) shows an E (score 53), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 75), a 2-band jump.

At 46 m² it sits well below the postcode median (166 m² across 22 EPCs), making it one of the more compact homes locally. Last changed hands 13 years ago, in August 2013. Across the public record there are 5 sales, relatively high churn for a single property. Across 1997–2013, sale prices on this property compounded at 10% per year. Today's modelled estimate of £348,000 is 45.8% above the 2013 sale price. On a £-per-square-foot basis, the last sale (£482/sq ft) was about 36.2% above the typical sold price in the postcode.