3 Castle Road, Northolt, UB5 4SD

3 Castle Road is a five-bedroom semi-detached house in Northolt (UB5 4SD). It has a recorded floor area of 41 m² (around 441 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (February 2021) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 4 certificates since July 2015. Between certificates, wall efficiency went from Very Poor to Good, roof efficiency went from Very Poor to Average and window efficiency went from Average to Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Good to Very Poor. Main heating runs on electricity: electricity, unspecified tariff. At 41 m² this is the 2nd smallest of 15 units on EPC record in the building, where floor areas span 14–111 m². The building's EPC ratings span E to C across 15 units on file. Records show the property has been extended at some point in its history.

Untraded for 23 years, with the last transfer in June 2003. Across 2001–2003, sale prices on this property compounded at 21.6% per year. Today's modelled estimate of £507,000 sits 102.8% above the 2003 sale of £250,000. On a £-per-square-foot basis, the last sale (£566/sq ft) was about 88.7% above the typical sold price in the postcode. At 41 m² it sits well below the postcode median (85 m² across 14 EPCs), making it one of the more compact homes locally. 5 bedrooms is on the larger side for this postcode, where 2 is the typical count. 5 planning records sit against the property, 4 approved, 1 refused. Past consents include an extension, subdivision and a porch, meaningful when judging how the property has evolved.