15 Blenheim House, Crown Square, Southwark, London, SE1 2SF

15 Blenheim House is a two-bedroom mid-terrace house in Southwark, London, London (SE1 2SF). It has a recorded floor area of 93 m² (around 1001 sq ft) and construction records dating it to 2012 onwards. There is a swimming pool on the plot, uncommon for the area. Other recorded features include a balcony and notable views. At 93 m² this is the 14th smallest of 32 units on EPC record in the building, where floor areas span 40–416 m². The building's EPC ratings span C to B, with this unit at the bottom. On EPC score it ranks last in the building (69 versus a best of 86). The latest certificate (August 2026) shows a C (score 69), just inside the C band. Earlier certificates rated it B (August 2016); the latest reading is one band lower. Between certificates, window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Average. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.

Today's modelled estimate of £1,140,000 is 63.2% below the 2017 sale of £3,100,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£3,097/sq ft) was about 17.4% above the typical sold price in the postcode. On the market in May 2017 and unlisted since — roughly 9 years. At 93 m² it's 23.1% smaller than the typical home in the postcode (121 m² median across 31 EPCs).