17a, Birnam Road, Islington, London, N4 3LJ

17a is a mid-terrace house in Islington, London, London (N4 3LJ). It has a recorded floor area of 79 m² (around 850 sq ft) and construction records dating it to 1900-1929. At 79 m² this is the 24th smallest of 35 units on EPC record in the building, where floor areas span 36–200 m². The building's EPC ratings span F to C across 35 units on file. The latest certificate (February 2017) shows a D (score 63), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 77).

Held since October 2008 — that's 18 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2002–2008, sale prices on this property compounded at 10.9% per year. Today's modelled estimate of £657,000 sits 119% above the 2008 sale of £300,000. At 79 m² it's 25.4% larger than the typical home in the postcode (63 m² median across 59 EPCs).