Castle House, Flat 1, 1 Castle Road, Dagenham, RM9 4XW

Castle House is a two-bedroom end-of-terrace house in Dagenham (RM9 4XW). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1930-1949 and council tax band C. At 47 m² this is the smallest unit on EPC record across Castle House (47–89 m²). The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (65 versus a best of 83). The latest certificate (July 2020) shows a D (score 65), on the cusp of jumping into the C band. Earlier certificates rated it B (May 2010); the latest reading is 2 bands lower. Between certificates, wall efficiency dropped from Good to Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 77).

It hasn't traded since September 2003, a hold of 23 years that's notably long for the area. At 47 m² it's 28.8% smaller than the typical home in the postcode (66 m² median across 31 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £240,000 sits 140% above the 2003 sale of £100,000. On a £-per-square-foot basis, the last sale (£198/sq ft) was about 34.8% below the postcode norm.