9a, Bushey Mill Crescent, Watford, WD24 7RA

9a is a one-bedroom semi-detached house in Watford (WD24 7RA). It has a recorded floor area of 36 m² (around 392 sq ft), construction records dating it to 1930-1949 and council tax band B. At 36 m² this is the smallest unit on EPC record across the building (36–126 m²). The building's EPC ratings span E to C across 19 units on file. The latest certificate (February 2012) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since September 2008. Between certificates, window efficiency went from Poor to Average and lighting went from Very Poor to Very Good; while wall efficiency dropped from Poor to Very Poor. The latest certificate is from February 2012, so improvements made since then won't be reflected.

Across 1999–2012, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £217,000 sits 59.6% above the 2012 sale of £136,000. On a £-per-square-foot basis, the last sale (£347/sq ft) was about 54.8% above the typical sold price in the postcode. At 36 m² it sits well below the postcode median (98 m² across 18 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 changed hands 14 years ago, in October 2012. Across the public record there are 4 sales, relatively high churn for a single property.