11a, Caxton Road, London, N22 6TB

11a is a semi-detached house in London (N22 6TB). It has a recorded floor area of 58 m² (around 624 sq ft) and construction records dating it to 1900-1929. The latest certificate (June 2020) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in March 2013 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Average, hot-water efficiency went from Average to Good and lighting went from Poor to Very Good. The recommended improvements would push it to C (score 77). At 58 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 53–59 m². The building's EPC ratings span E to C across 4 units on file.

Held since September 1997 — that's 29 years off the open market, well above the local norm. 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 £448,000 sits 670.4% above the 1997 sale of £58,150. On a £-per-square-foot basis, the last sale (£93/sq ft) was about 91.3% below the postcode norm.