491a, Green Lanes, London, N13 4BS

491a is a mid-terrace house in London (N13 4BS). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to 1930-1949 and council tax band B. At 45 m² this is the 32nd smallest of 36 units on EPC record in the building, where floor areas span 14–75 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (August 2021) shows a C (score 76), near the top of the C band. When first surveyed in August 2014 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while window efficiency dropped from Good to Average.

It hasn't traded since February 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 45 m² it's 26.8% larger than the typical home in the postcode (36 m² median across 58 EPCs). Across 1999–2007, sale prices on this property compounded at 11.7% per year. Today's modelled estimate of £332,000 is 48.9% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£460/sq ft) was about 90% above the typical sold price in the postcode.