Flat 1, 17 Wales Avenue, Carshalton, SM5 3QN

Flat 1 is a one-bedroom semi-detached house in Carshalton (SM5 3QN). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (February 2025) shows a D (score 62), on the cusp of jumping into the C band. When first surveyed in May 2017 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency dropped from Good to Average. The recommended improvements would push it to C (score 75). At 47 m² this is the 4th smallest of 6 units on EPC record in the building, where floor areas span 25–53 m². The building's EPC ratings span D to C, with this unit at the bottom.

Held since October 2005 — that's 21 years off the open market, well above the local norm. Today's modelled estimate of £236,000 sits 118.5% above the 2005 sale of £108,000. On a £-per-square-foot basis, the last sale (£213/sq ft) was about 34.7% below the postcode norm. At 47 m² it sits well below the postcode median (71 m² across 24 EPCs), making it one of the more compact homes locally.