Flat 2, 21 Catherine Road, Surbiton, KT6 4HA

Flat 2 is a two-bedroom detached house in Surbiton (KT6 4HA). It has a recorded floor area of 78 m² (around 836 sq ft), construction records dating it to before 1900 and council tax band D. At 78 m² this is the 2nd smallest of 3 units on EPC record in the building, where floor areas span 67–79 m². The building's EPC ratings span E to D, with this unit at the bottom. On EPC score it ranks last in the building (42 versus a best of 68). The latest certificate (April 2011) shows an E (score 42), well below the UK norm with real room to improve. The latest certificate is from April 2011, so improvements made since then won't be reflected.

Last sold in August 2011, so it's been off the market for around 15 years. Across the public record there are 6 sales, relatively high churn for a single property. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and partial demolition, meaningful when judging how the property has evolved. It lags the bulk of the postcode on energy efficiency (less efficient than 73% of similar EPCs). Across 1998–2011, sale prices on this property compounded at 8.7% per year. Today's modelled estimate of £533,000 is 30% above the 2011 sale price. On a £-per-square-foot basis, the last sale (£490/sq ft) was about 40.7% above the typical sold price in the postcode.