17b, Chepstow Close, Northampton, NN5 7EB

17b is a semi-detached house in Northampton (NN5 7EB). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to 1983-1990 and council tax band A. At 45 m² this is the smallest unit on EPC record across the building (45–114 m²). The building's EPC ratings span E to B across 25 units on file. The latest certificate (November 2019) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 4 certificates since January 2009. Between certificates, window efficiency went from Average to Good. The recommended improvements would push it to C (score 73). Main heating runs on electricity.

Across 1999–2019, sale prices on this property compounded at 5.1% per year. Today's modelled estimate of £118,000 is 28.3% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£190/sq ft) was about 50% above the typical sold price in the postcode. At 45 m² it's 19.6% smaller than the typical home in the postcode (56 m² median across 24 EPCs). Last sale on file: £92,000 in November 2019.