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

21 Guernsey House is an end-of-terrace house in Watford (WD18 6ST). It has a recorded floor area of 31 m² (around 334 sq ft), construction records dating it to 1991-1995 and council tax band B. The latest certificate (September 2019) shows a C (score 79), near the top of the C band. The rating has held steady at C across 2 certificates since September 2009. Between certificates, window efficiency went from Very Poor to Average and lighting went from Poor to Good. The recommended improvements would push it to B (score 82). Main heating runs on electricity. At 31 m² this is the 3rd 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 across 32 units on file.

Last changed hands 12 years ago, in April 2014. Across the public record there are 4 sales, relatively high churn for a single property. Across 1997–2014, sale prices on this property compounded at 6.6% per year. Today's modelled estimate of £161,000 is 38.2% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£349/sq ft) was about 83.1% above the typical sold price in the postcode. At 31 m² it's 20.5% smaller than the typical home in the postcode (39 m² median across 31 EPCs).