9 Grantley Street, Grantham, NG31 6BN

9 Grantley Street is a mid-terrace house in Grantham (NG31 6BN). It has a recorded floor area of 42 m² (around 452 sq ft) and construction records dating it to 1900-1929. The latest certificate (March 2019) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since May 2014. Between certificates, wall efficiency went from Very Poor to Good; while hot-water efficiency dropped from Good to Very Poor and main heating dropped from Good to Average. The recommended improvements would push it to C (score 75). Main heating runs on electricity. At 42 m² this is the 4th smallest of 43 units on EPC record in the building, where floor areas span 30–126 m². The building's EPC ratings span F to B across 43 units on file.

Untraded for 29 years, with the last transfer in March 1997. 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 £119,000 sits 580% above the 1997 sale of £17,500. On a £-per-square-foot basis, the last sale (£39/sq ft) was about 62.8% below the postcode norm. At 42 m² it's 23.6% smaller than the typical home in the postcode (55 m² median across 42 EPCs).