57a, High Street, Hemel Hempstead, HP1 3AF

57a is a one-bedroom mid-terrace house in Hemel Hempstead (HP1 3AF). It has a recorded floor area of 33 m² (around 355 sq ft) and construction records dating it to before 1900. The latest certificate (January 2021) shows an E (score 46), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 74), a 2-band jump. Main heating runs on electricity. At 33 m² this is the 2nd smallest of 5 units on EPC record in 57a, where floor areas span 20–62 m². The building's EPC ratings span F to D across 5 units on file. Other recorded features include notable views and a basement.

At 33 m² it sits well below the postcode median (53 m² across 34 EPCs), making it one of the more compact homes locally. Last sale on file: £180,000 in August 2021. Across the public record there are 5 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 1997–2021, sale prices on this property compounded at 4.9% per year. On a £-per-square-foot basis, the last sale (£507/sq ft) was about 66.3% above the typical sold price in the postcode.