20a, Westway, Caterham, CR3 5TP

20a is a semi-detached house in Caterham (CR3 5TP). It has a recorded floor area of 38 m² (around 409 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (May 2022) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since May 2012. Between certificates, roof efficiency went from Average to Good; while lighting dropped from Very Good to Good. The recommended improvements would push it to C (score 72). At 38 m² this is the 7th smallest of 31 units on EPC record in the building, where floor areas span 22–111 m². The building's EPC ratings span E to C across 31 units on file.

Held since June 2007 — that's 19 years off the open market, well above the local norm. 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 10.9% per year. Today's modelled estimate of £305,000 is 21% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£616/sq ft) was about 152.7% above the typical sold price in the postcode. At 38 m² it's 27.6% smaller than the typical home in the postcode (53 m² median across 30 EPCs).