Flat 4, 4 Bourne Avenue, Salisbury, SP1 1LP

Flat 4 is a one-bedroom end-of-terrace house in Salisbury (SP1 1LP). It has a recorded floor area of 50 m² (around 538 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (May 2014) shows an F (score 35), near the bottom of the EPC scale. The rating has held steady at F across 2 certificates since November 2009. Between certificates, hot-water efficiency went from Very Poor to Average and main heating went from Poor to Average. The recommended improvements would push it to E (score 54). Main heating runs on electricity. The latest certificate is from May 2014, so improvements made since then won't be reflected. At 50 m² this is the 3rd smallest of 4 units on EPC record in the building, where floor areas span 40–74 m². The building's EPC ratings span F to C, with this unit at the bottom. On EPC score it ranks last in the building (35 versus a best of 70).

It hasn't traded since June 2010, a hold of 16 years that's notably long for the area. Across the public record there are 4 sales, relatively high churn for a single property. At 50 m² it sits well below the postcode median (181 m² across 8 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 1996–2010, sale prices on this property compounded at 8% per year. Today's modelled estimate of £143,000 is 24.3% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£214/sq ft) was about 92.2% above the typical sold price in the postcode.