11a, Burnaby Gardens, Hounslow, London, W4 3DS

11a is a one-bedroom mid-terrace house in Hounslow, London, London (W4 3DS). It has a recorded floor area of 54 m² (around 584 sq ft), construction records dating it to 1900-1929 and council tax band D. At 54 m² this is the smallest unit on EPC record across 11a (54–55 m²). On EPC score it ranks first in the building (72 versus a worst of 71). The latest certificate (June 2010) shows a C (score 72). When first surveyed in October 2008 the rating was E, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Good to Very Good and lighting went from Very Poor to Poor. The latest certificate is from June 2010, so improvements made since then won't be reflected.

Held since February 2008 — that's 18 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2006–2008, sale prices on this property compounded at 49.4% per year. Today's modelled estimate of £506,000 is 28.1% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£676/sq ft) was about 97.8% above the typical sold price in the postcode.