584a, Old Chester Road, Birkenhead, CH42 4NW

584a is a one-bedroom mid-terrace house in Birkenhead (CH42 4NW). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to 1900-1929 and council tax band A. At 42 m² this is the smallest unit on EPC record across the building (42–251 m²). The building's EPC ratings span F to C across 8 units on file. Other recorded features include a basement. The latest certificate (July 2016) shows a D (score 64), on the cusp of jumping into the C band. Earlier certificates rated it C (February 2010); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good. The recommended improvements would push it to C (score 75).

Untraded for 16 years, with the last transfer in March 2010. Today's modelled estimate of £108,000 sits 87.8% above the 2010 sale of £57,500. On a £-per-square-foot basis, the last sale (£127/sq ft) was about 180.4% above the typical sold price in the postcode. At 42 m² it sits well below the postcode median (184 m² across 7 EPCs), making it one of the more compact homes locally.