3 Wall Hall Mansion, Wall Hall Drive, Aldenham, Watford, WD25 8BZ

3 Wall Hall Mansion is a two-bedroom mid-terrace house in Aldenham, Watford, Watford (WD25 8BZ). It has a recorded floor area of 134 m² (around 1442 sq ft), construction records dating it to 2003-2006 and council tax band G. At 134 m² this is the 3rd smallest of 7 units on EPC record in the building, where floor areas span 16–478 m². The building's EPC ratings span E to C, with this unit at the top. On EPC score it ranks first in the building (77 versus a worst of 54). The latest certificate (August 2020) shows a C (score 77), near the top of the C band. The rating has held steady at C across 2 certificates since November 2008.

It hasn't traded since September 2009, a hold of 17 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Today's modelled estimate of £709,000 sits 50.9% above the 2009 sale of £470,000. On a £-per-square-foot basis, the last sale (£326/sq ft) was about 32.4% below the postcode norm. At 134 m² it sits well below the postcode median (270 m² across 6 EPCs), making it one of the more compact homes locally.