4 Cromwell Mews, Susan Wood, Chislehurst, BR7 5NG

4 Cromwell Mews is a one-bedroom mid-terrace house in Chislehurst (BR7 5NG). It has a recorded floor area of 44 m² (around 474 sq ft), construction records dating it to 1967-1975 and council tax band D. At 44 m² this is the 2nd smallest of 6 units on EPC record in the building, where floor areas span 34–55 m². The building's EPC ratings span E to D, with this unit at the bottom. The latest certificate (September 2019) shows an E (score 54), well below the UK norm with real room to improve. Earlier certificates rated it D (August 2009); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and lighting went from Very Poor to Very Good; while roof efficiency dropped from Poor to Very Poor. The recommended improvements would push it to D (score 67).

At 44 m² it sits well below the postcode median (77 m² across 55 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 87% of similar EPCs). Across 1999–2020, sale prices on this property compounded at 5% per year. On a £-per-square-foot basis, the last sale (£570/sq ft) was about 69.4% above the typical sold price in the postcode. Sold October 2020 for £270,000.