20 Guernsey House, Pioneer Way, Watford, WD18 6ST

20 Guernsey House is a one-bedroom mid-terrace house in Watford (WD18 6ST). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to 1996-2002 and council tax band B. Tenure is freehold. The latest certificate (April 2023) returns a B (score 82), comfortably above the UK average. When first surveyed in April 2013 the rating was C, the property has climbed 1 band since. Between certificates, main heating went from Poor to Average; while window efficiency dropped from Good to Average. Main heating runs on electricity. At 32 m² this is the 6th smallest of 32 units on EPC record in the building, where floor areas span 29–62 m². The building's EPC ratings span E to B, with this unit at the top.

Held since March 1997 — that's 29 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 32 m² it's 17.9% smaller than the typical home in the postcode (39 m² median across 31 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £171,000 sits 368.5% above the 1997 sale of £36,500. On a £-per-square-foot basis, the last sale (£106/sq ft) was about 46.2% below the postcode norm.