Flat 1, 139 Sidney Road, Walton On Thames, KT12 3SA

Flat 1 is a one-bedroom end-of-terrace house in Walton On Thames (KT12 3SA). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 1991-1995 and council tax band C. At 48 m² this is the smallest unit on EPC record across the building (48–56 m²). The building's EPC ratings span F to C across 5 units on file. The latest certificate (May 2016) shows a D (score 66), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 73). The latest certificate is from May 2016, so improvements made since then won't be reflected.

Across 1998–2025, sale prices on this property compounded at 5.5% per year. Today's modelled estimate of £241,000 is 16.9% below the 2025 sale of £290,000, running counter to the wider postcode trend, which makes the EPC and condition history especially worth a look. On a £-per-square-foot basis, the last sale (£561/sq ft) was about 58.7% above the typical sold price in the postcode. Most recent transfer was September 2025 at £290,000 — fresh data. At 48 m² it sits well below the postcode median (130 m² across 32 EPCs), making it one of the more compact homes locally.