258a, Chiswick High Road, Hounslow, London, W4 1PD

258a is a mid-terrace house in Hounslow, London, London (W4 1PD). It has a recorded floor area of 74 m² (around 799 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (February 2012) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in October 2010 the rating was G, the property has climbed 3 bands since. Between certificates, roof efficiency went from Very Poor to Good, hot-water efficiency went from Very Poor to Good and lighting went from Very Poor to Average. The latest certificate is from February 2012, so improvements made since then won't be reflected. At 74 m² this is the 39th smallest of 49 units on EPC record in the building, where floor areas span 20–146 m². The building's EPC ratings span E to B across 49 units on file.

At 74 m² it's 19.7% larger than the typical home in the postcode (62 m² median across 54 EPCs). Across 2011–2012, sale prices on this property compounded at 68.6% per year. Today's modelled estimate of £678,000 is 13.9% above the 2012 sale price. On a £-per-square-foot basis, the last sale (£745/sq ft) was about 68.3% above the typical sold price in the postcode. Last changed hands 14 years ago, in March 2012.