Flat 1, 4 Lyall Street, London, SW1X 8DW

Flat 1 is a two-bedroom end-of-terrace house in London (SW1X 8DW). It has a recorded floor area of 120 m² (around 1292 sq ft), construction records dating it to before 1900 and council tax band G. At 120 m² this is the 7th smallest of 9 units on EPC record in the building, where floor areas span 39–209 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (50 versus a best of 76). Period features are noted in the property record. The latest certificate (February 2019) shows an E (score 50), well below the UK norm with real room to improve. Earlier certificates rated it D (November 2008); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Good to Average. The recommended improvements would lift it to C (score 71), a 2-band jump.

Held since May 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Sale prices here have outpaced London HPI: 19.1% per year against 0% for the wider region. Today's modelled estimate of £2,438,000 sits 53.5% above the 2007 sale of £1,588,000. On a £-per-square-foot basis, the last sale (£1,229/sq ft) was about 37% above the typical sold price in the postcode. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. 2 planning records sit against the property, 2 approved, 0 refused. The record references listed-building consent, which constrain future alterations.