11 Cowen Avenue, Harrow, HA2 0LU

11 Cowen Avenue is a three-bedroom end-of-terrace house in Harrow (HA2 0LU). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to 1950-1966 and council tax band C. The latest certificate (March 2017) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since May 2015. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would push it to C (score 73). At 73 m² this is the 67th smallest of 71 units on EPC record in the building, where floor areas span 44–94 m². The building's EPC ratings span E to B across 71 units on file. Other recorded features include a balcony.

Untraded for 17 years, with the last transfer in October 2009. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £326,000 sits 81.1% above the 2009 sale of £180,000. At 73 m² it's 19.7% larger than the typical home in the postcode (61 m² median across 70 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 70% of similar EPCs).