20c, Blackheath Grove, London, SE3 0DQ

20c is a semi-detached house in London (SE3 0DQ). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1900-1929 and council tax band C. At 47 m² this is the 6th smallest of 24 units on EPC record in the building, where floor areas span 28–114 m². The building's EPC ratings span F to C, with this unit at the top. The latest certificate (May 2020) shows a C (score 71). When first surveyed in April 2010 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency dropped from Average to Poor and lighting dropped from Very Good to Very Poor. The recommended improvements would push it to B (score 82).

It hasn't traded since October 2002, a hold of 24 years that's notably long for the area. Today's modelled estimate of £332,000 sits 125.9% above the 2002 sale of £147,000. On a £-per-square-foot basis, the last sale (£291/sq ft) was about 23.8% below the postcode norm. At 47 m² it's 16.1% smaller than the typical home in the postcode (56 m² median across 45 EPCs).