503a, Mansfield Road, Nottingham, NG5 2JJ

503a is a three-bedroom mid-terrace house in Nottingham (NG5 2JJ). It has a recorded floor area of 57 m² (around 614 sq ft) and construction records dating it to 1900-1929. The latest certificate (November 2021) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it C (August 2018); the latest reading is one band lower. Between certificates, window efficiency dropped from Good to Average and hot-water efficiency dropped from Good to Very Poor. The recommended improvements would lift it to B (score 82), a 2-band jump. Main heating runs on electricity. At 57 m² this is the 7th smallest of 21 units on EPC record in the building, where floor areas span 48–108 m². The building's EPC ratings span E to B across 21 units on file.

It hasn't traded since June 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £118,000 sits 136% above the 2007 sale of £50,000. On a £-per-square-foot basis, the last sale (£81/sq ft) was about 39.8% below the postcode norm. At 57 m² it's 23% smaller than the typical home in the postcode (74 m² median across 20 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 70% of similar EPCs).