289a, Chiswick High Road, Hounslow, London, W4 4HH

289a is a mid-terrace house in Hounslow, London, London (W4 4HH). It has a recorded floor area of 14 m² (around 151 sq ft) and construction records dating it to before 1900. At 14 m² this is the smallest unit on EPC record across the building (14–108 m²). The building's EPC ratings span E to C across 24 units on file. The latest certificate (January 2014) shows a D (score 67), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 76). The latest certificate is from January 2014, so improvements made since then won't be reflected.

Across 2000–2024, sale prices on this property compounded at 5% per year. Today's modelled estimate of £600,000 is 25% below the 2024 sale of £800,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£5,309/sq ft) was about 989.7% above the typical sold price in the postcode. At 14 m² it sits well below the postcode median (43 m² across 35 EPCs), making it one of the more compact homes locally. Most recent transfer: May 2024 at £800,000.