11b, Addison Grove, Hounslow, London, W4 1EP

11b is a two-bedroom semi-detached house in Hounslow, London, London (W4 1EP). It has a recorded floor area of 73 m² (around 780 sq ft), construction records dating it to before 1900 and council tax band E. It is a listed building, which means external alterations are tightly controlled but it may qualify for heritage tax reliefs. At 73 m² this is the 3rd smallest of 11 units on EPC record in the building, where floor areas span 31–271 m². The building's EPC ratings span F to D, with this unit at the bottom. The latest certificate (June 2010) shows an F (score 37), near the bottom of the EPC scale. Earlier certificates rated it E (June 2009); the latest reading is one band lower. Between certificates, window efficiency went from Poor to Average. The recommended improvements would push it to E (score 44). The latest certificate is from June 2010, so improvements made since then won't be reflected.

At 73 m² it sits well below the postcode median (136 m² across 10 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Last sale on file: £835,000 in August 2019. Across the public record there are 4 sales, relatively high churn for a single property. 6 planning records sit against the property, 2 approved, 2 refused. Past consents include new windows, meaningful when judging how the property has evolved. Across 2000–2019, sale prices on this property compounded at 5.7% per year. On a £-per-square-foot basis, the last sale (£1,070/sq ft) was about 63.2% above the typical sold price in the postcode.