21 Balgowan Street, Greenwich, London, SE18 1EB

21 Balgowan Street is a three-bedroom mid-terrace house in Greenwich, London, London (SE18 1EB). It has a recorded floor area of 12 m² (around 129 sq ft), construction records dating it to 1900-1929 and council tax band C. At 12 m² this is the smallest unit on EPC record across the building (12–125 m²). The building's EPC ratings span E to C, with this unit at the top. Period features are noted in the property record. Our model identifies extension potential, subject to local planning policy. The latest certificate (June 2026) shows a C (score 69), just inside the C band. When first surveyed in April 2010 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency dropped from Average to Very Poor and hot-water efficiency dropped from Good to Very Poor. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.

At 12 m² it sits well below the postcode median (79 m² across 12 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the top 10% of properties in this postcode. Across 2012–2015, sale prices on this property compounded at 26.3% per year. Today's modelled estimate of £345,000 is 13.1% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£2,361/sq ft) was about 1736.8% above the typical sold price in the postcode. Last sold in September 2015, so it's been off the market for around 11 years.