Charleston House, Apartment 1, 13 High Street, Hemel Hempstead, HP1 3AA

Charleston House is a semi-detached house in Hemel Hempstead (HP1 3AA). It has a recorded floor area of 38 m² (around 409 sq ft) and construction records dating it to 2021. At 38 m² this is the smallest unit on EPC record across Charleston House (38–61 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (December 2021) shows a C (score 72). When first surveyed in February 2019 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency went from Good to Very Good. Main heating runs on electricity: electricity, unspecified tariff.

Held since January 2000 — that's 26 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £320,000 sits 81.8% above the 2000 sale of £176,000. On a £-per-square-foot basis, the last sale (£430/sq ft) was about 49.2% above the typical sold price in the postcode. 15 planning records sit against the property, 13 approved, 2 refused. Past consents include subdivision, change of use to residential, new windows and an extension, meaningful when judging how the property has evolved. At 38 m² it's 16.5% smaller than the typical home in the postcode (46 m² median across 30 EPCs). Its energy rating outperforms most of the postcode (better than 70% of similar EPCs).