3 Herne Court, Richfield Road, Bushey, WD23 4XF

3 Herne Court is a one-bedroom semi-detached house in Bushey (WD23 4XF). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1950-1966 and council tax band D. The latest certificate (August 2015) shows a D (score 58), a step below the typical UK home. The rating has held steady at D across 3 certificates since February 2010. Between certificates, window efficiency went from Very Poor to Average, lighting went from Very Poor to Good and main heating went from Poor to Average; while wall efficiency dropped from Good to Poor. The recommended improvements would push it to C (score 77). Main heating runs on electricity. The latest certificate is from August 2015, so improvements made since then won't be reflected. At 46 m² this is the 5th smallest of 30 units on EPC record in the building, where floor areas span 42–67 m². The building's EPC ratings span E to B across 30 units on file.

Untraded for 30 years, with the last transfer in June 1996. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £168,000 sits 217.3% above the 1996 sale of £52,950. On a £-per-square-foot basis, the last sale (£107/sq ft) was about 61% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 90% of similar EPCs).