3a, Durban Road East, Watford, WD18 0RN

3a is a one-bedroom end-of-terrace house in Watford (WD18 0RN). It has a recorded floor area of 40 m² (around 431 sq ft), construction records dating it to before 1900 and council tax band B. At 40 m² this is the smallest unit on EPC record across the building (40–105 m²). The building's EPC ratings span E to C across 28 units on file. The latest certificate (April 2013) shows a D (score 65), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 77). The latest certificate is from April 2013, so improvements made since then won't be reflected.

At 40 m² it sits well below the postcode median (75 m² across 27 EPCs), making it one of the more compact homes locally. Last sold in January 2014, so it's been off the market for around 12 years. Across the public record there are 4 sales, relatively high churn for a single property. Across 1999–2014, sale prices on this property compounded at 6.6% per year. Today's modelled estimate of £221,000 is 49.3% above the 2014 sale price. On a £-per-square-foot basis, the last sale (£344/sq ft) was about 44.7% above the typical sold price in the postcode.