The Exchange, Flat 3, 89 Marlowes, Hemel Hempstead, HP1 1EH

The Exchange is a one-bedroom semi-detached house in Hemel Hempstead (HP1 1EH). It has a recorded floor area of 72 m² (around 775 sq ft) and construction records dating it to 2020. At 72 m² this is the largest unit on EPC record across The Exchange (33–72 m²). The building's EPC ratings span E to A, with this unit at the bottom. The latest certificate (March 2021) shows an E (score 50), well below the UK norm with real room to improve. Main heating runs on electricity: electricity, unspecified tariff.

At 72 m² the property is well over the postcode median (42 m² across 53 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £247,000 is 31.7% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£242/sq ft) was about 51.9% below the postcode norm. Last sale on file: £187,500 in April 2021. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.