21 St Marys Avenue, Purley On Thames, Reading, RG8 8BJ

21 St Marys Avenue is a four-bedroom semi-detached house in Purley On Thames, Reading, Reading (RG8 8BJ). It has a recorded floor area of 120 m² (around 1292 sq ft), construction records dating it to 1983-1990 and council tax band E. The latest certificate (June 2019) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2009. Between certificates, roof efficiency went from Poor to Average and lighting went from Average to Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 81), a 2-band jump. Other recorded features include a conservatory.

It hasn't traded since October 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £458,000 sits 99.1% above the 2009 sale of £230,000. On a £-per-square-foot basis, the last sale (£178/sq ft) was about 15.2% below the postcode norm.