21a, Sorrento Road, Sutton, SM1 1QU

21a is a one-bedroom end-of-terrace house in Sutton (SM1 1QU). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 1900-1929 and council tax band B. At 37 m² this is the smallest unit on EPC record across the building (37–154 m²). The building's EPC ratings span E to C across 31 units on file. The latest certificate (June 2022) shows a D (score 55), a step below the typical UK home. When first surveyed in March 2012 the rating was E, the property has climbed 1 band since.

Across 1999–2014, sale prices on this property compounded at 5.7% per year. Today's modelled estimate of £234,000 sits 80% above the 2014 sale of £130,000. On a £-per-square-foot basis, the last sale (£326/sq ft) was about 16.9% above the typical sold price in the postcode. At 37 m² it sits well below the postcode median (78 m² across 30 EPCs), making it one of the more compact homes locally. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Last sold in March 2014, so it's been off the market for around 12 years.