15 Hartwell House, Gibbs Couch, Watford, WD19 5EQ

15 Hartwell House is a property in Watford (WD19 5EQ). It has a recorded floor area of 37 m² (around 398 sq ft). At 37 m² this is the smallest unit on EPC record across the building (37–86 m²). The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (November 2016) shows a D (score 66), on the cusp of jumping into the C band. Main heating runs on electricity: electricity, unspecified tariff.

Today's modelled estimate of £293,000 is 19.7% below the 2017 sale of £365,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£916/sq ft) was about 115.1% above the typical sold price in the postcode. At 37 m² it sits well below the postcode median (58 m² across 42 EPCs), making it one of the more compact homes locally. On the market in November 2017 and unlisted since — roughly 9 years.