23 Gisbey House, Union Lane, Isleworth, TW7 6GH

23 Gisbey House is a one-bedroom end-of-terrace house in Isleworth (TW7 6GH). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1996-2002 and council tax band C. The latest certificate (August 2020) shows a C (score 79), near the top of the C band. Earlier certificates rated it B (March 2010); the latest reading is one band lower. Between certificates, wall efficiency dropped from Very Good to Good and lighting dropped from Very Good to Very Poor. The recommended improvements would push it to B (score 81). Main heating runs on electricity. At 49 m² this is the 2nd smallest of 27 units on EPC record in the building, where floor areas span 48–68 m². The building's EPC ratings span D to B across 27 units on file.

Across 2010–2018, sale prices on this property compounded at 6.1% per year. Today's modelled estimate of £260,000 is 11.9% below the 2018 sale of £295,000, below the original sale price, which typically signals condition or completion-status changes worth verifying. On a £-per-square-foot basis, the last sale (£559/sq ft) was about 59% above the typical sold price in the postcode. Last sold in February 2018, so it's been off the market for around 8 years. At 49 m² it's 20.3% smaller than the typical home in the postcode (62 m² median across 26 EPCs).