25a, Queens Road, Wallington, SM6 0AG

25a is a semi-detached house in Wallington (SM6 0AG). It has a recorded floor area of 20 m² (around 215 sq ft) and construction records dating it to 1900-1929. At 20 m² this is the smallest unit on EPC record across the building (20–95 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (39 versus a best of 76). The latest certificate (September 2019) shows an E (score 39), well below the UK norm with real room to improve. When first surveyed in February 2016 the rating was G, the property has climbed 2 bands since. Between certificates, main heating went from Very Poor to Average. The recommended improvements would lift it to C (score 73), a 2-band jump. Main heating runs on electricity.

Held since July 2004 — that's 22 years off the open market, well above the local norm. Sale prices here have outpaced England HPI: 14.4% per year against 0% for the wider region. Today's modelled estimate of £548,000 is 39.8% above the 2004 sale price. On a £-per-square-foot basis, the last sale (£1,821/sq ft) was about 571.2% above the typical sold price in the postcode. At 20 m² it sits well below the postcode median (62 m² across 32 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 84% of similar EPCs).