70b, Grantley Street, Grantham, NG31 6BW

70b is a mid-terrace house in Grantham (NG31 6BW). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (March 2020) shows a D (score 61), on the cusp of jumping into the C band. When first surveyed in January 2009 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Poor to Average, lighting went from Very Poor to Very Good and main heating went from Poor to Average. The recommended improvements would lift it to B (score 81), a 2-band jump. Main heating runs on electricity. At 42 m² this is the 3rd smallest of 35 units on EPC record in the building, where floor areas span 20–144 m². The building's EPC ratings span E to C across 35 units on file.

Held since March 2000 — that's 26 years off the open market, well above the local norm. 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 £109,000 sits 678.6% above the 2000 sale of £14,000. On a £-per-square-foot basis, the last sale (£31/sq ft) was about 64.8% below the postcode norm. At 42 m² it sits well below the postcode median (64 m² across 34 EPCs), making it one of the more compact homes locally.