4 David Close, Harlington, Hayes, UB3 5AE

4 David Close is a detached house in Harlington, Hayes, Hayes (UB3 5AE). It has a recorded floor area of 28 m² (around 301 sq ft), construction records dating it to 1967-1975 and council tax band B. At 28 m² this is the 4th smallest of 40 units on EPC record in the building, where floor areas span 25–49 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (62 versus a best of 84). The latest certificate (January 2021) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it B (May 2009); the latest reading is 2 bands lower. Between certificates, lighting went from Average to Good; while wall efficiency dropped from Good to Poor and roof efficiency dropped from Good to Very Poor.

Untraded for 26 years, with the last transfer in February 2000. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £173,000 sits 203.5% above the 2000 sale of £57,000. On a £-per-square-foot basis, the last sale (£189/sq ft) was about 29.7% below the postcode norm.