23 Helena Square, Southwark, London, SE16 5XP

23 Helena Square is a two-bedroom mid-terrace house in Southwark, London, London (SE16 5XP). It has a recorded floor area of 58 m² (around 624 sq ft), construction records dating it to 1991-1995 and council tax band E. The latest certificate (May 2019) shows a C (score 74). The rating has held steady at C across 2 certificates since March 2009. Between certificates, hot-water efficiency dropped from Average to Poor and main heating dropped from Poor to Very Poor. The recommended improvements would push it to B (score 82). Main heating runs on electricity. At 58 m² this is the 16th 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. Period features are noted in the property record.

Sold February 2020 for £455,000. Across the public record there are 4 sales, relatively high churn for a single property. Across 2002–2020, sale prices on this property compounded at 4.9% per year. On a £-per-square-foot basis, the last sale (£729/sq ft) was about 76.5% above the typical sold price in the postcode.