40b, Monks Avenue, Barnet, EN5 1DD

40b is a one-bedroom end-of-terrace house in Barnet (EN5 1DD). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1930-1949 and council tax band C. At 54 m² this is the smallest unit on EPC record across the building (54–244 m²). The building's EPC ratings span F to C across 13 units on file. The latest certificate (January 2014) shows a D (score 61), on the cusp of jumping into the C band. When first surveyed in March 2009 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Poor to Good, hot-water efficiency went from Average to Good and lighting went from Very Poor to Very Good. The latest certificate is from January 2014, so improvements made since then won't be reflected.

At 54 m² it sits well below the postcode median (139 m² across 12 EPCs), making it one of the more compact homes locally. On the market in May 2014 and unlisted since — roughly 12 years. Across the public record there are 6 sales, relatively high churn for a single property. One planning record on file: an extension approved in 2021. Past consents include an extension, meaningful when judging how the property has evolved. Across 1996–2014, sale prices on this property compounded at 8.4% per year. Today's modelled estimate of £323,000 is 29.2% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£430/sq ft) was about 90.6% above the typical sold price in the postcode.