21b, Perran Avenue, Fishermead, Milton Keynes, MK6 2DE

21b is a detached house in Fishermead, Milton Keynes, Milton Keynes (MK6 2DE). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to 1976-1982 and council tax band A. At 45 m² this is the smallest unit on EPC record across the building (45–122 m²). The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (March 2014) shows a D (score 64), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 73). The latest certificate is from March 2014, so improvements made since then won't be reflected.

It hasn't traded since October 2004, a hold of 22 years that's notably long for the area. Across 1997–2004, sale prices on this property compounded at 21.9% per year. Today's modelled estimate of £140,000 sits 87.9% above the 2004 sale of £74,500. On a £-per-square-foot basis, the last sale (£154/sq ft) was about 36.4% above the typical sold price in the postcode. At 45 m² it sits well below the postcode median (108 m² across 13 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 77% of similar EPCs).