4a, Smith Street, Watford, WD18 0AA

4a is a two-bedroom end-of-terrace house in Watford (WD18 0AA). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 2003-2006 and council tax band C. At 48 m² this is the smallest unit on EPC record across the building (48–108 m²). The building's EPC ratings span E to C, with this unit at the top. The latest certificate (November 2022) shows a C (score 78), near the top of the C band. Earlier certificates rated it B (December 2012); the latest reading is one band lower. Between certificates, wall efficiency dropped from Very Good to Good and window efficiency dropped from Very Good to Average.

14 planning records sit against the property, 4 approved, 1 refused. Past consents include new windows and partial demolition, meaningful when judging how the property has evolved. The record references conservation-area consent, which constrain future alterations. Today's modelled estimate of £263,000 is 19.5% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£426/sq ft) was about 109.4% above the typical sold price in the postcode. Last changed hands 12 years ago, in September 2014. At 48 m² it's 20% smaller than the typical home in the postcode (60 m² median across 13 EPCs).