Bonnington House, Flat 42, Ayley Croft, Enfield, EN1 1XT

Bonnington House is a two-bedroom end-of-terrace house in Enfield (EN1 1XT). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1967-1975 and council tax band A. At 59 m² this is the 18th smallest of 25 units on EPC record in Bonnington House, where floor areas span 33–70 m². The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (47 versus a best of 83). Other recorded features include a balcony. The latest certificate (April 2016) shows an E (score 47), well below the UK norm with real room to improve. Earlier certificates rated it D (October 2009); the latest reading is one band lower. Between certificates, hot-water efficiency dropped from Average to Very Poor and lighting dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 84), a 3-band jump. Main heating runs on electricity. The latest certificate is from April 2016, so improvements made since then won't be reflected.

It hasn't traded since March 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 59 m² it's 29.7% larger than the typical home in the postcode (46 m² median across 24 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2002–2007, sale prices on this property compounded at 2.4% per year. Today's modelled estimate of £217,000 sits 106.7% above the 2007 sale of £105,000. On a £-per-square-foot basis, the last sale (£165/sq ft) was about 36.1% below the postcode norm.