Flat 5, 40 Dabbs Hill Lane, Northolt, UB5 4AG

Flat 5 is a two-bedroom detached house in Northolt (UB5 4AG). It has a recorded floor area of 57 m² (around 611 sq ft) and construction records dating it to 1950-1966. At 57 m² this is the smallest unit on EPC record across the building (57–65 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (51 versus a best of 79). Other recorded features include a balcony and outbuildings. The latest certificate (July 2010) shows an E (score 51), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 61). The latest certificate is from July 2010, so improvements made since then won't be reflected.

Held since February 2011 — that's 15 years off the open market, well above the local norm. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £308,000 sits 83.3% above the 2011 sale of £168,000. On a £-per-square-foot basis, the last sale (£275/sq ft) was about 16.5% above the typical sold price in the postcode.