23 Amersham Avenue, Langdon Hills, Basildon, SS16 6SJ

23 Amersham Avenue is a three-bedroom detached house in Langdon Hills, Basildon, Basildon (SS16 6SJ). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1967-1975 and council tax band E. The latest certificate (July 2019) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2009. Between certificates, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Poor. The recommended improvements would lift it to B (score 82), a 2-band jump.

Held since May 1998 — that's 28 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 92 m² the property is well over the postcode median (65 m² across 18 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £462,000 sits 402.2% above the 1998 sale of £92,000. On a £-per-square-foot basis, the last sale (£93/sq ft) was about 58.3% below the postcode norm.