28a, Westbury Road, Watford, WD18 0DL

28a is an end-of-terrace house in Watford (WD18 0DL). It has a recorded floor area of 75 m² (around 807 sq ft) and construction records dating it to before 1900. The latest certificate (April 2020) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in July 2009 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and hot-water efficiency went from Good to Very Good. The recommended improvements would push it to C (score 75). At 75 m² this is the 2nd smallest of 15 units on EPC record in the building, where floor areas span 49–152 m². The building's EPC ratings span E to C across 15 units on file.

Most recent transfer: March 2021 at £275,000. Across the public record there are 4 sales, relatively high churn for a single property. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. Across 2002–2021, sale prices on this property compounded at 4% per year. Today's modelled estimate of £341,000 is 24% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£341/sq ft) was about 47.5% above the typical sold price in the postcode. At 75 m² it's 28.4% smaller than the typical home in the postcode (105 m² median across 14 EPCs).