18 Warwick Square Mews, Westminster, London, SW1V 2EL

18 Warwick Square Mews is a one-bedroom mid-terrace house in Westminster, London, London (SW1V 2EL). It has a recorded floor area of 58 m² (around 624 sq ft), construction records dating it to before 1900 and council tax band F. At 58 m² this is the 4th smallest of 11 units on EPC record in the building, where floor areas span 36–258 m². The building's EPC ratings span E to D, with this unit at the top. On EPC score it ranks first in the building (67 versus a worst of 48). The home occupies a cul-de-sac position. The latest certificate (April 2025) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2009. Between certificates, window efficiency went from Very Poor to Poor and lighting went from Poor to Very Good. The recommended improvements would push it to C (score 77).

Untraded for 16 years, with the last transfer in March 2010. Across the public record there are 4 sales, relatively high churn for a single property. Across 1998–2010, sale prices on this property compounded at 3.4% per year. Today's modelled estimate of £667,000 sits 77.9% above the 2010 sale of £375,000. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension and new windows, meaningful when judging how the property has evolved. At 58 m² it's 17.1% smaller than the typical home in the postcode (70 m² median across 13 EPCs).