4 Castle Street, Southampton, SO14 6HA

4 Castle Street is a four-bedroom mid-terrace house in Southampton (SO14 6HA). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (January 2019) shows a C (score 70). The rating has held steady at C across 2 certificates since January 2009. Between certificates, wall efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 88).

It changed hands recently, sold April 2026 for £250,000. At 54 m² it sits well below the postcode median (81 m² across 9 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 89% of similar EPCs). 2 planning records sit against the property, 2 approved, 0 refused. Past consents include HMO conversion and an extension, meaningful when judging how the property has evolved. Across 1997–2026, sale prices on this property compounded at 5.8% per year. On a £-per-square-foot basis, the last sale (£430/sq ft) was about 178.6% above the typical sold price in the postcode.