101a, St Georges Square, Westminster, London, SW1V 3QP

101a is a three-bedroom mid-terrace house in Westminster, London, London (SW1V 3QP). It has a recorded floor area of 90 m² (around 969 sq ft), construction records dating it to before 1900 and council tax band F. It is a listed building, which means external alterations are tightly controlled but it may qualify for heritage tax reliefs. Other recorded features include notable views. At 90 m² this is the 11th smallest of 25 units on EPC record in the building, where floor areas span 46–162 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (September 2021) shows an E (score 53), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 74), a 2-band jump.

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £950,000 sits 131.7% above the 2013 sale of £410,000. On a £-per-square-foot basis, the last sale (£423/sq ft) was about 46.5% below the postcode norm. 4 planning records sit against the property, 4 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. Last sold in September 2013, so it's been off the market for around 13 years.