Flat, 35 Jasmine Gardens, Hatfield, AL10 0BJ

Flat is a semi-detached house in Hatfield (AL10 0BJ). It has a recorded floor area of 26 m² (around 280 sq ft), construction records dating it to 1983-1990 and council tax band B. At 26 m² this is the smallest unit on EPC record across the building (26–35 m²). The building's EPC ratings span D to C, with this unit at the bottom. The latest certificate (February 2019) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (March 2009); the latest reading is one band lower. Between certificates, wall efficiency went from Average to Good, window efficiency went from Very Poor to Average and hot-water efficiency went from Very Poor to Average; while main heating dropped from Average to Very Poor. The recommended improvements would push it to C (score 78). Main heating runs on electricity.

Untraded for 28 years, with the last transfer in September 1998. 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 £134,000 sits 282.9% above the 1998 sale of £35,000. On a £-per-square-foot basis, the last sale (£125/sq ft) was about 46.9% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 76% of similar EPCs).