21 Blackheath Grove, Lewisham, London, SE3 0DQ

21 Blackheath Grove is a one-bedroom end-of-terrace house in Lewisham, London, London (SE3 0DQ). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to before 1900 and council tax band C. At 47 m² this is the smallest unit on EPC record across the building (47–233 m²). The building's EPC ratings span F to C across 22 units on file. The latest certificate (February 2020) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2018. Between certificates, wall efficiency went from Very Poor to Poor; while lighting dropped from Very Good to Very Poor. The recommended improvements would push it to C (score 78).

Last sale on file: £355,000 in October 2024. Across the public record there are 4 sales, relatively high churn for a single property. Across 2004–2024, sale prices on this property compounded at 3.7% per year. On a £-per-square-foot basis, the last sale (£702/sq ft) was about 106.5% above the typical sold price in the postcode. At 47 m² it's 16.1% smaller than the typical home in the postcode (56 m² median across 45 EPCs).