63 Castle Road, Isleworth, TW7 6QR

63 Castle Road is a one-bedroom mid-terrace house in Isleworth (TW7 6QR). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to before 1900 and council tax band C. At 48 m² this is the smallest unit on EPC record across the building (48–130 m²). The building's EPC ratings span G to C across 31 units on file. Period features are noted in the property record. The latest certificate (March 2023) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 5 certificates since November 2009. Between certificates, window efficiency went from Very Poor to Good and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would push it to C (score 72).

Most recent transfer was March 2025 at £301,000 — fresh data. Across the public record there are 5 sales, relatively high churn for a single property. At 48 m² it sits well below the postcode median (93 m² across 30 EPCs), making it one of the more compact homes locally. Across 2003–2025, sale prices on this property compounded at 3.9% per year. On a £-per-square-foot basis, the last sale (£583/sq ft) was about 95.4% above the typical sold price in the postcode.