Flat 3, 30 Byron Avenue, Gloucester, GL2 5AG

Flat 3 is a two-bedroom detached house in Gloucester (GL2 5AG). It has a recorded floor area of 51 m² (around 549 sq ft), construction records dating it to 1950-1966 and council tax band A. At 51 m² this is the smallest unit on EPC record across the building (51–65 m²). The building's EPC ratings span D to C, with this unit at the top. On EPC score it ranks first in the building (77 versus a worst of 60). The latest certificate (October 2023) shows a C (score 77), near the top of the C band. Earlier certificates rated it B (August 2009); the latest reading is one band lower. Between certificates, wall efficiency went from Poor to Average; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good.

Held since February 2002 — that's 24 years off the open market, well above the local norm. Across 1996–2002, sale prices on this property compounded at 23.4% per year. Today's modelled estimate of £135,000 sits 190.3% above the 2002 sale of £46,500. On a £-per-square-foot basis, the last sale (£85/sq ft) was about 21.5% below the postcode norm. At 51 m² it's 15% smaller than the typical home in the postcode (60 m² median across 36 EPCs).