23a, First Avenue, Dagenham, RM10 9AT

23a is a one-bedroom end-of-terrace house in Dagenham (RM10 9AT). It has a recorded floor area of 40 m² (around 431 sq ft), construction records dating it to 1930-1949 and council tax band A. At 40 m² this is the smallest unit on EPC record across the building (40–193 m²). The building's EPC ratings span E to C, with this unit at the top. The latest certificate (October 2023) shows a C (score 69), just inside the C band. When first surveyed in October 2009 the rating was E, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Average and lighting went from Average to Very Good.

Untraded for 25 years, with the last transfer in January 2001. Across the public record there are 4 sales, relatively high churn for a single property. Across 1995–2001, sale prices on this property compounded at 11.1% per year. Today's modelled estimate of £181,000 sits 241.5% above the 2001 sale of £53,000. On a £-per-square-foot basis, the last sale (£123/sq ft) was about 38.2% below the postcode norm. At 40 m² it sits well below the postcode median (90 m² across 31 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count.