51a, Basement Flat, Aldridge Road Villas, Westminster, London, W11 1BN

51a is a semi-detached house in Westminster, London, London (W11 1BN). It has a recorded floor area of 102 m² (around 1098 sq ft) and construction records dating it to 1930-1949. The latest certificate (November 2025) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since September 2012. Between certificates, wall efficiency went from Very Poor to Average and lighting went from Poor to Very Good; while window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 72). This certificate was lodged in the last six months, so the rating reflects current condition.

It hasn't traded since March 1998, a hold of 28 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 102 m² the property is well over the postcode median (55 m² across 36 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £1,425,000 sits 187.9% above the 1998 sale of £495,000. On a £-per-square-foot basis, the last sale (£451/sq ft) was about 18.9% below the postcode norm.