17 Arrancourt, Gilligan Close, Horsham, RH12 1UA

17 Arrancourt is a one-bedroom end-of-terrace house in Horsham (RH12 1UA). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1976-1982 and council tax band B. The latest certificate (May 2019) shows a C (score 69), just inside the C band. The rating has held steady at C across 2 certificates since October 2008. Between certificates, wall efficiency went from Average to Good, roof efficiency went from Poor to Average and lighting went from Very Poor to Average; while hot-water efficiency dropped from Average to Poor. At 49 m² this is the 16th smallest of 39 units on EPC record in the building, where floor areas span 45–65 m². The building's EPC ratings span D to B across 39 units on file.

It hasn't traded since December 1999, a hold of 26 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £190,000 sits 194.6% above the 1999 sale of £64,500. On a £-per-square-foot basis, the last sale (£122/sq ft) was about 39% below the postcode norm.