Flat 4, 139 Sidney Road, Walton On Thames, KT12 3SA

Flat 4 is a two-bedroom semi-detached house in Walton On Thames (KT12 3SA). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1900-1929 and council tax band D. The latest certificate (May 2022) shows an E (score 51), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since June 2012. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Very Poor to Average and lighting went from Average to Very Good; while hot-water efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to C (score 78), a 2-band jump. Main heating runs on electricity.

Held since December 2004 — that's 21 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. Across 1998–2004, sale prices on this property compounded at 11% per year. Today's modelled estimate of £323,000 sits 77% above the 2004 sale of £182,500. At 56 m² it sits well below the postcode median (130 m² across 32 EPCs), making it one of the more compact homes locally.