63d, High Street, Hemel Hempstead, HP1 3AF

63d is a one-bedroom mid-terrace house in Hemel Hempstead (HP1 3AF). It has a recorded floor area of 25 m² (around 269 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (June 2019) shows a D (score 63), on the cusp of jumping into the C band. Earlier certificates rated it C (January 2009); the latest reading is one band lower. Between certificates, wall efficiency dropped from Average to Very Poor. At 25 m² this is the 2nd smallest of 35 units on EPC record in the building, where floor areas span 20–154 m². The building's EPC ratings span G to B across 35 units on file.

At 25 m² it sits well below the postcode median (53 m² across 34 EPCs), making it one of the more compact homes locally. Last changed hands 11 years ago, in November 2015. Across the public record there are 4 sales, relatively high churn for a single property. Across 1999–2015, sale prices on this property compounded at 5.7% per year. Today's modelled estimate of £177,000 is 36.2% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£483/sq ft) was about 59.4% above the typical sold price in the postcode.