21 Helena Square, Southwark, London, SE16 5XP

21 Helena Square is a two-bedroom mid-terrace house in Southwark, London, London (SE16 5XP). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1991-1995 and council tax band E. The latest certificate (August 2022) shows a C (score 80), near the top of the C band. The rating has held steady at C across 2 certificates since August 2012. Between certificates, lighting went from Good to Very Good and main heating went from Poor to Average. The recommended improvements would push it to B (score 83). Main heating runs on electricity. At 80 m² this is the 25th smallest of 31 units on EPC record in the building, where floor areas span 39–103 m². The building's EPC ratings span D to B across 31 units on file.

Held since July 1997 — that's 29 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 80 m² the property is well over the postcode median (57 m² across 30 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £439,000 sits 265.8% above the 1997 sale of £120,000. On a £-per-square-foot basis, the last sale (£139/sq ft) was about 66.5% below the postcode norm.