21 Petersham Mews, Kensington And Chelsea, London, SW7 5NR

21 Petersham Mews is a mid-terrace house in Kensington And Chelsea, London, London (SW7 5NR). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1900-1929 and council tax band G. At 56 m² this is the 7th smallest of 24 units on EPC record in the building, where floor areas span 36–290 m². The building's EPC ratings span E to A, with this unit at the bottom. The latest certificate (September 2020) shows an E (score 52), well below the UK norm with real room to improve. Earlier certificates rated it D (September 2010); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while roof efficiency dropped from Good to Very Poor. The recommended improvements would push it to D (score 62).

Sale prices here have outpaced London HPI: 7.4% per year against 0% for the wider region. Today's modelled estimate of £1,000,000 is 56.5% below the 2024 sale of £2,300,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£3,816/sq ft) was about 266.2% above the typical sold price in the postcode. 2 planning records sit against the property, 1 approved, 0 refused, 1 pending. Past consents include an extension, meaningful when judging how the property has evolved. An active application for a basement excavation is awaiting a decision. At 56 m² it sits well below the postcode median (107 m² across 23 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 78% of similar EPCs). Last sale on file: £2,300,000 in August 2024.