Flat 1, 11 Charles Crescent, Harrow, HA1 4AR

Flat 1 is an end-of-terrace house in Harrow (HA1 4AR). It has a recorded floor area of 61 m² (around 657 sq ft) and construction records dating it to 1967-1975. The latest certificate (June 2015) shows an F (score 27), near the bottom of the EPC scale. Earlier certificates rated it D (April 2013); the latest reading is 2 bands lower. Between certificates, lighting went from Poor to Good; while hot-water efficiency dropped from Average to Very Poor. The recommended improvements would push it to E (score 54). Main heating runs on electricity. The latest certificate is from June 2015, so improvements made since then won't be reflected. At 61 m² this is the 8th smallest of 11 units on EPC record in the building, where floor areas span 53–62 m². The building's EPC ratings span F to C, with this unit at the bottom. On EPC score it ranks last in the building (27 versus a best of 73).

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £338,000 is 22.5% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£420/sq ft) was about 61.8% above the typical sold price in the postcode. Last sold in November 2015, so it's been off the market for around 11 years.