40b, Old Church Road, Waltham Forest, London, E4 8DB

40b is a mid-terrace house in Waltham Forest, London, London (E4 8DB). It has a recorded floor area of 71 m² (around 764 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (January 2018) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since July 2010. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 80). At 71 m² this is the 12th smallest of 19 units on EPC record in the building, where floor areas span 23–82 m². The building's EPC ratings span F to C across 19 units on file.

On the market in January 2018 and unlisted since — roughly 8 years. Across the public record there are 5 sales, relatively high churn for a single property. At 71 m² it's 18.3% larger than the typical home in the postcode (60 m² median across 18 EPCs). Across 1996–2018, sale prices on this property compounded at 9.9% per year. On a £-per-square-foot basis, the last sale (£353/sq ft) was about 84.6% above the typical sold price in the postcode.