Flat 2, 79 Norton Street, Grantham, NG31 6BY

Flat 2 is a one-bedroom mid-terrace house in Grantham (NG31 6BY). It has a recorded floor area of 29 m² (around 312 sq ft) and construction records dating it to 1900-1929. At 29 m² this is the smallest unit on EPC record across the building (29–73 m²). The building's EPC ratings span F to D, with this unit at the top. On EPC score it ranks first in the building (59 versus a worst of 25). The latest certificate (April 2016) shows a D (score 59), a step below the typical UK home. When first surveyed in September 2009 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Good; while main heating dropped from Poor to Very Poor. The recommended improvements would push it to C (score 78). Main heating runs on electricity. The latest certificate is from April 2016, so improvements made since then won't be reflected.

Held since April 2004 — that's 22 years off the open market, well above the local norm. Sale prices here have outpaced England HPI: 25% per year against 0% for the wider region. Today's modelled estimate of £119,000 sits 226% above the 2004 sale of £36,500. On a £-per-square-foot basis, the last sale (£117/sq ft) was about 18.2% above the typical sold price in the postcode. At 29 m² it sits well below the postcode median (64 m² across 58 EPCs), making it one of the more compact homes locally.