47a, Colliers Water Lane, Thornton Heath, CR7 7LE

47a is an end-of-terrace house in Thornton Heath (CR7 7LE). It has a recorded floor area of 51 m² (around 549 sq ft), construction records dating it to 1900-1929 and council tax band B. At 51 m² this is the smallest unit on EPC record across the building (51–136 m²). The building's EPC ratings span E to C across 12 units on file. The latest certificate (January 2025) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in November 2014 the rating was F, the property has climbed 2 bands since. Between certificates, roof efficiency went from Poor to Average, window efficiency went from Poor to Good and hot-water efficiency went from Very Poor to Good. The recommended improvements would push it to C (score 76).

Held since December 2002 — that's 23 years off the open market, well above the local norm. Today's modelled estimate of £228,000 sits 117.1% above the 2002 sale of £105,000. On a £-per-square-foot basis, the last sale (£191/sq ft) was about 23.1% below the postcode norm. At 51 m² it sits well below the postcode median (110 m² across 11 EPCs), making it one of the more compact homes locally.