31a, Crowstone Avenue, Westcliff On Sea, SS0 8HT

31a is a two-bedroom semi-detached house in Westcliff On Sea (SS0 8HT). It has a recorded floor area of 70 m² (around 753 sq ft) and construction records dating it to 1900-1929. At 70 m² this is the smallest unit on EPC record across the building (70–296 m²). The building's EPC ratings span F to C across 16 units on file. The property has underfloor heating on record, all of which lower running costs and tend to lift resale appeal. Other recorded features include a balcony. The latest certificate (May 2017) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since April 2012. Between certificates, roof efficiency went from Average to Good, window efficiency went from Poor to Average and lighting went from Poor to Good. The recommended improvements would push it to C (score 76).

At 70 m² it sits well below the postcode median (174 m² across 15 EPCs), making it one of the more compact homes locally. 9 years since the last transfer (August 2017). Across the public record there are 4 sales, relatively high churn for a single property. Across 2001–2017, sale prices on this property compounded at 7.2% per year. Today's modelled estimate of £310,000 is 12.7% above the 2017 sale price. On a £-per-square-foot basis, the last sale (£365/sq ft) was about 89.1% above the typical sold price in the postcode.