2a, Eccleston Square, Westminster, London, SW1V 1NP

2a is a mid-terrace house in Westminster, London, London (SW1V 1NP). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to before 1900 and council tax band F. The latest certificate (July 2018) shows an E (score 51), well below the UK norm with real room to improve. When first surveyed in March 2010 the rating was G, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Very Poor to Poor and lighting went from Poor to Average; while window efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 82), a 3-band jump. Main heating runs on electricity. At 71 m² this is the 4th smallest of 12 units on EPC record in the building, where floor areas span 45–440 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 (51 versus a best of 80).

It hasn't traded since June 2003, a hold of 23 years that's notably long for the area. At 71 m² it's 24.6% larger than the typical home in the postcode (57 m² median across 37 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £566,000 sits 218% above the 2003 sale of £178,000. On a £-per-square-foot basis, the last sale (£233/sq ft) was about 71.6% below the postcode norm.