Flat 3, 15 Cadogan Road, Surbiton, KT6 4DQ

Flat 3 is a semi-detached house in Surbiton (KT6 4DQ). It has a recorded floor area of 36 m² (around 388 sq ft), construction records dating it to before 1900 and council tax band C. At 36 m² this is the smallest unit on EPC record across the building (36–64 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (61 versus a best of 69). The latest certificate (June 2019) shows a D (score 61), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2009. Between certificates, lighting dropped from Very Good to Very Poor. The recommended improvements would push it to C (score 76).

Untraded for 21 years, with the last transfer in June 2005. Across 1995–2005, sale prices on this property compounded at 13.3% per year. Today's modelled estimate of £333,000 sits 83% above the 2005 sale of £182,000. On a £-per-square-foot basis, the last sale (£470/sq ft) was about 36.6% above the typical sold price in the postcode. At 36 m² it sits well below the postcode median (67 m² across 32 EPCs), making it one of the more compact homes locally.