18 Derby Street, Norwich, NR2 4PU

18 Derby Street is a one-bedroom detached house in Norwich (NR2 4PU). It has a recorded floor area of 41 m² (around 441 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (August 2020) shows a D (score 59), a step below the typical UK home. When first surveyed in March 2014 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Very Poor to Average and lighting went from Good to Very Good; while wall efficiency dropped from Good to Average. At 41 m² this is the 2nd smallest of 38 units on EPC record in the building, where floor areas span 40–78 m². The building's EPC ratings span D to B, with this unit at the bottom. Other recorded features include a self-contained annexe.

Today's modelled estimate of £116,000 sits 65.7% above the 2015 sale of £70,000. At 41 m² it sits well below the postcode median (59 m² across 37 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 81% of similar EPCs). Last sold in March 2015, so it's been off the market for around 11 years.