17b, Northbrook Road, London, N22 8YQ

17b is a semi-detached house in London (N22 8YQ). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to before 1900 and council tax band C. At 50 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 39–87 m². The building's EPC ratings span E to D, with this unit at the top. The latest certificate (February 2019) shows a D (score 61), on the cusp of jumping into the C band. When first surveyed in October 2012 the rating was E, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good. The recommended improvements would push it to C (score 76).

At 50 m² it sits well below the postcode median (81 m² across 28 EPCs), making it one of the more compact homes locally. Across 2007–2020, sale prices on this property compounded at 4.4% per year. On a £-per-square-foot basis, the last sale (£948/sq ft) was about 215.1% above the typical sold price in the postcode. Sold June 2020 for £510,000.