15a, Avenue Terrace, Westcliff On Sea, SS0 7PL

15a is a two-bedroom mid-terrace house in Westcliff On Sea (SS0 7PL). It has a recorded floor area of 57 m² (around 616 sq ft) and construction records dating it to 1900-1929. It is a listed building, which means external alterations are tightly controlled but it may qualify for heritage tax reliefs. At 57 m² this is the smallest unit on EPC record across the building (57–145 m²). The building's EPC ratings span G to C across 24 units on file. The latest certificate (July 2011) shows a D (score 67), on the cusp of jumping into the C band. The latest certificate is from July 2011, so improvements made since then won't be reflected.

At 57 m² it sits well below the postcode median (84 m² across 23 EPCs), making it one of the more compact homes locally. On the market in October 2017 and unlisted since — roughly 9 years. Across the public record there are 5 sales, relatively high churn for a single property. Across 2001–2017, sale prices on this property compounded at 6.5% per year. Today's modelled estimate of £211,000 is 21.6% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£281/sq ft) was about 43% above the typical sold price in the postcode.