21 Grove Court, Southbourne Grove, Westcliff On Sea, SS0 0AW

21 Grove Court is an end-of-terrace house in Westcliff On Sea (SS0 0AW). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1950-1966 and council tax band B. The latest certificate (June 2024) shows an E (score 40), well below the UK norm with real room to improve. Earlier certificates rated it D (August 2011); the latest reading is one band lower. Between certificates, lighting went from Poor to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Average to Very Poor. The recommended improvements would lift it to C (score 74), a 2-band jump. Main heating runs on electricity. At 54 m² this is the 6th smallest of 30 units on EPC record in the building, where floor areas span 38–81 m². The building's EPC ratings span G to B across 30 units on file.

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Most recent transfer was May 2025 at £185,000 — fresh data. Today's modelled estimate of £234,000 is 26.5% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£318/sq ft) was about 74.3% above the typical sold price in the postcode.