Flat 1, 3 Montagu Square, London, W1H 2LA

Flat 1 is a mid-terrace house in London (W1H 2LA). It has a recorded floor area of 183 m² (around 1970 sq ft), construction records dating it to before 1900 and council tax band G. At 183 m² this is the largest unit on EPC record across the building (103–183 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (68 versus a best of 74). The latest certificate (May 2020) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2010); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Average and lighting went from Poor to Very Good; while wall efficiency dropped from Good to Very Poor and hot-water efficiency dropped from Very Good to Poor. The recommended improvements would push it to C (score 77).

Sale prices here have outpaced London HPI: 9.3% per year against 0% for the wider region. Today's modelled estimate of £3,479,000 is 20% above the 2021 sale price. At 183 m² the property is well over the postcode median (123 m² across 13 EPCs), placing it in the larger end of the local stock. 6 planning records sit against the property, 4 approved, 0 refused, 2 pending. Past consents include new windows, meaningful when judging how the property has evolved. An application is currently awaiting a decision. The record references listed-building consent, which constrain future alterations. Most recent transfer: May 2021 at £2,900,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.