1 De Havilland Close, Hatfield, AL10 0DS

1 De Havilland Close is a detached house in Hatfield (AL10 0DS). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1950-1966 and council tax band C. At 46 m² this is the smallest unit on EPC record across the building (46–198 m²). The building's EPC ratings span E to C across 22 units on file. The latest certificate (March 2018) shows a D (score 68), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 74).

Untraded for 19 years, with the last transfer in October 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2002–2007, sale prices on this property compounded at 11.6% per year. Today's modelled estimate of £227,000 sits 52.9% above the 2007 sale of £148,500. On a £-per-square-foot basis, the last sale (£300/sq ft) was about 132.9% above the typical sold price in the postcode. At 46 m² it sits well below the postcode median (111 m² across 21 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 81% of similar EPCs).