4a, Holtlands Drive, Alvaston, Derby, DE24 0AR

4a is a two-bedroom mid-terrace house in Alvaston, Derby, Derby (DE24 0AR). It has a recorded floor area of 70 m² (around 753 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (May 2014) shows a G (score 7), near the bottom of the EPC scale. The recommended improvements would push it to F (score 38). Main heating runs on electricity. The latest certificate is from May 2014, so improvements made since then won't be reflected. At 70 m² this is the 4th smallest of 16 units on EPC record in the building, where floor areas span 33–99 m². The building's EPC ratings span G to C, with this unit at the bottom. On EPC score it ranks last in the building (7 versus a best of 70).

Untraded for 30 years, with the last transfer in February 1996. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £122,000 sits 713.3% above the 1996 sale of £15,000. On a £-per-square-foot basis, the last sale (£20/sq ft) was about 86.8% below the postcode norm.