Flat 1, 3 St Andrew S Road, Surbiton, KT6 4DT

Flat 1 is a one-bedroom semi-detached house in Surbiton (KT6 4DT). It has a recorded floor area of 35 m² (around 377 sq ft), construction records dating it to before 1900 and council tax band C. At 35 m² this is the 3rd smallest of 4 units on EPC record in the building, where floor areas span 31–85 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (March 2015) shows a D (score 63), on the cusp of jumping into the C band. Earlier certificates rated it C (March 2010); the latest reading is one band lower. Between certificates, window efficiency went from Average to Good; while lighting dropped from Average to Poor. The recommended improvements would push it to C (score 76). The latest certificate is from March 2015, so improvements made since then won't be reflected.

Held since November 2007 — that's 19 years off the open market, well above the local norm. Across the public record there are 5 sales, relatively high churn for a single property. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 1998–2007, sale prices on this property compounded at 15.9% per year. Today's modelled estimate of £300,000 is 30.4% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£611/sq ft) was about 50.2% above the typical sold price in the postcode.