136a, Kingston Road, Staines Upon Thames, TW18 1BL

136a is a semi-detached house in Staines Upon Thames (TW18 1BL). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (June 2022) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in May 2013 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Average, window efficiency went from Very Poor to Good and hot-water efficiency went from Average to Good. The recommended improvements would push it to C (score 74). At 47 m² this is the 2nd smallest of 16 units on EPC record in the building, where floor areas span 46–159 m². The building's EPC ratings span E to B across 16 units on file.

Today's modelled estimate of £308,000 is 33% below the 2016 sale of £460,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£909/sq ft) was about 168.8% above the typical sold price in the postcode. At 47 m² it's 21.7% smaller than the typical home in the postcode (60 m² median across 15 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 73% of similar EPCs). 10 years since the last transfer (September 2016).