Flat 1, 17 Knowsley Road, Southport, PR9 0BN

Flat 1 is a semi-detached house in Southport (PR9 0BN). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to before 1900 and council tax band A. At 49 m² this is the 6th smallest of 8 units on EPC record in the building, where floor areas span 41–56 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (November 2015) shows a C (score 73). When first surveyed in March 2014 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good. The latest certificate is from November 2015, so improvements made since then won't be reflected.

Across 2008–2016, sale prices on this property compounded at -10.9% per year. Today's modelled estimate of £125,000 sits 171.7% above the 2016 sale of £46,000. On a £-per-square-foot basis, the last sale (£87/sq ft) was about 56.2% below the postcode norm. At 49 m² it's 19.5% larger than the typical home in the postcode (41 m² median across 7 EPCs). Its energy rating outperforms most of the postcode (better than 71% of similar EPCs). On the market in April 2016 and unlisted since — roughly 10 years.