11a, Borrowdale Avenue, Harrow, HA3 7PX

11a is a three-bedroom detached house in Harrow (HA3 7PX). It has a recorded floor area of 248 m² (around 2669 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (July 2014) shows a C (score 80), near the top of the C band. When first surveyed in July 2009 the rating was F, the property has climbed 3 bands since. Between certificates, roof efficiency went from Poor to Average, window efficiency went from Average to Good and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Poor to Very Poor. The recommended improvements would push it to B (score 85). Main heating runs on electricity. The latest certificate is from July 2014, so improvements made since then won't be reflected.

At 248 m² the property is well over the postcode median (83 m² across 7 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £877,000 sits 113.9% above the 2013 sale of £410,000. On a £-per-square-foot basis, the last sale (£154/sq ft) was about 65.8% below the postcode norm. 2 planning records sit against the property, 1 approved, 0 refused. Past consents include an extension, a loft conversion, a garage conversion and a porch, meaningful when judging how the property has evolved. 13 years since the last transfer (August 2013).