339a, Westborough Road, Westcliff On Sea, SS0 9PX

339a is a one-bedroom end-of-terrace house in Westcliff On Sea (SS0 9PX). It has a recorded floor area of 53 m² (around 570 sq ft) and construction records dating it to 1900-1929. The latest certificate (March 2018) shows an E (score 51), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 68). At 53 m² this is the 9th smallest of 27 units on EPC record in the building, where floor areas span 23–141 m². The building's EPC ratings span F to C across 27 units on file.

It hasn't traded since May 2008, a hold of 18 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 53 m² it's 15.9% smaller than the typical home in the postcode (63 m² median across 26 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 73% of similar EPCs). Across 1998–2008, sale prices on this property compounded at 17.4% per year. Today's modelled estimate of £163,000 is 41.7% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£202/sq ft) was about 42.3% above the typical sold price in the postcode.