Basement Flat, 3 St Leonard S Road, Surbiton, KT6 4DE

Basement Flat is a one-bedroom semi-detached house in Surbiton (KT6 4DE). It has a recorded floor area of 39 m² (around 420 sq ft) and construction records dating it to 1900-1929. The latest certificate (March 2021) shows a D (score 68), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since January 2011. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and lighting went from Poor to Very Good. The recommended improvements would push it to C (score 76). Period features are noted in the property record.

It changed hands recently, sold February 2025 for £356,000. Across the public record there are 8 sales, relatively high churn for a single property. At 39 m² it sits well below the postcode median (56 m² across 41 EPCs), making it one of the more compact homes locally. Across 2000–2025, sale prices on this property compounded at 5.1% per year. On a £-per-square-foot basis, the last sale (£848/sq ft) was about 113% above the typical sold price in the postcode.