15a, Balmoral Road, Borrowash, Derby, DE72 3FZ

15a is a two-bedroom end-of-terrace house in Borrowash, Derby, Derby (DE72 3FZ). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1950-1966 and council tax band A. At 54 m² this is the smallest unit on EPC record across the building (54–143 m²). The building's EPC ratings span F to B across 41 units on file. The latest certificate (November 2023) shows a D (score 61), on the cusp of jumping into the C band. When first surveyed in May 2009 the rating was G, the property has climbed 3 bands since. Between certificates, window efficiency went from Poor to Good, hot-water efficiency went from Poor to Good and lighting went from Poor to Very Good.

Untraded for 26 years, with the last transfer in September 2000. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £119,000 sits 325.8% above the 2000 sale of £27,950. On a £-per-square-foot basis, the last sale (£48/sq ft) was about 70% below the postcode norm. At 54 m² it's 28% smaller than the typical home in the postcode (75 m² median across 40 EPCs).