1a, Helena Street, Liverpool, L9 1BH

1a is an end-of-terrace house in Liverpool (L9 1BH). It has a recorded floor area of 43 m² (around 463 sq ft) and construction records dating it to 1900-1929. At 43 m² this is the smallest unit on EPC record across the building (43–101 m²). The building's EPC ratings span F to C across 18 units on file. The latest certificate (September 2018) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 5 certificates since September 2018. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Good to Very Good. The recommended improvements would lift it to B (score 81), a 2-band jump. Main heating runs on electricity.

Held since May 2005 — that's 21 years off the open market, well above the local norm. At 43 m² it sits well below the postcode median (84 m² across 17 EPCs), making it one of the more compact homes locally. On a £-per-square-foot basis, the last sale (£356/sq ft) was about 334.8% above the typical sold price in the postcode.