23 Longs Mill, Brookbridge Court, Derby, DE1 3LG

23 Longs Mill is a two-bedroom mid-terrace house in Derby (DE1 3LG). It has a recorded floor area of 58 m² (around 624 sq ft), construction records dating it to before 1900 and council tax band C. At 58 m² this is the 2nd smallest of 18 units on EPC record in the building, where floor areas span 56–81 m². The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (54 versus a best of 83). The latest certificate (May 2021) shows an E (score 54), well below the UK norm with real room to improve. Earlier certificates rated it C (April 2011); the latest reading is 2 bands lower. Between certificates, lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Very Poor and roof efficiency dropped from Good to Very Poor. The recommended improvements would lift it to C (score 75), a 2-band jump.

At 58 m² it's 17.1% smaller than the typical home in the postcode (70 m² median across 46 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2011–2022, sale prices on this property compounded at 12.8% per year. On a £-per-square-foot basis, the last sale (£234/sq ft) was about 33.5% above the typical sold price in the postcode. Most recent transfer: August 2022 at £146,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.