54a, Robertson Road, Brighton, BN1 5NJ

54a is a mid-terrace house in Brighton (BN1 5NJ). It has a recorded floor area of 46 m² (around 495 sq ft) and construction records dating it to 1900-1929. The latest certificate (July 2025) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since October 2014. Between certificates, window efficiency went from Very Poor to Poor and lighting went from Very Poor to Good; while wall efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 75). At 46 m² this is the 3rd smallest of 34 units on EPC record in the building, where floor areas span 37–156 m². The building's EPC ratings span E to C across 34 units on file.

It hasn't traded since November 1997, a hold of 29 years that's notably long for the area. 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 £250,000 sits 747.5% above the 1997 sale of £29,500. On a £-per-square-foot basis, the last sale (£60/sq ft) was about 77.1% below the postcode norm. At 46 m² it sits well below the postcode median (71 m² across 33 EPCs), making it one of the more compact homes locally.